Class Vector
- All Implemented Interfaces:
Iterable<Number>,Collection<Number>,List<Number>,RandomAccess
Vector can be a wrapper around an array of Java primitive type
(typically float[] or double[]), or it may be a function calculating values on the fly.
Often the two above-cited cases are used together, for example in a time series where:
- x[i] is a linear function of i (e.g. the sampling time of measurements performed at a fixed time interval)
- y[i] is the measurement of a phenomenon at time x[i].
Instantiation
Instances ofVector are usually created by calls to the create(Object, boolean) static method.
The supplied array is not cloned – changes to the primitive array are reflected in the vector, and vice-versa.
Vectors can be a view over a subsection of the given array, or can provide a view of the elements in reverse order,
etc. The example below creates a view over a subsection:
float[] array = new float[100]; Vector v = Vector.create(array, false).subList(20, 40) // At this point, v.doubleValue(0) is equivalent to (double) array[20].
Usage
The methods that are most often used afterVector creation are size() and doubleValue(int)
or intValue(int). Those methods make abstraction of the underlying data type. For example if the vector is
backed by an array of type int[], then calls to doubleValue(index) will:
- Convert the
int[index]value to adoublevalue. - If
isUnsigned()istrue, apply the necessary bitmask before conversion.
short to long) are always allowed.
Narrowing conversions are allowed if the result can be represented at least approximately by the target type.
For example, conversions from double to float are always allowed (values that are too large for
the float type are represented by positive of negative infinity), but conversions from long to
short are allowed only if the value is between Short.MIN_VALUE and Short.MAX_VALUE inclusive.
ByteBuffer
in standard Java, but they actually serve different purposes. The ByteBuffer getter methods
(for example getShort(int), getLong(int), etc.) allow to decode a sequence of
bytes in a way determined by the type of the value to decode (2 bytes for a short, 8 bytes
for a long, etc.) – the type of the stored value must be known before to read it.
By contrast, this Vector class is used in situations where the decoding has already been done
by the code that create a Vector object, but the data type may not be known
by the code that will use the Vector object.
For example, a method performing a numerical calculation may want to see the data as double values
without concern about whether the data were really stored as double or as float values.
For the situations where a Buffer is needed, inter-operability is provided by the buffer()
method and by accepting buffer in the create(Object, boolean) method.- Since:
- 0.8
- See Also:
Defined in the sis-utility module
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Field Summary
Fields inherited from class AbstractList
modCount -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbuffer()Returns the vector data as ajava.niobuffer.bytebyteValue(int index) Returns the value at the given index as abyte.compress(double tolerance) Returns a vector with the same data than this vector but encoded in a more compact way, orthisif this method cannot do better than currentVectorinstance.concatenate(Vector toAppend) Returns the concatenation of this vector with the given one.static Vectorcreate(double[] array) Wraps the given array of floating point values.static VectorWraps the given object in a vector.static VectorcreateForDecimal(float[] array) Wraps the givenfloat[]array in a vector that preserve the string representations in base 10.static VectorcreateSequence(Number first, Number increment, int length) Creates a sequence of numbers in a given range of values using the given increment.abstract doubledoubleValue(int index) Returns the value at the given index as adouble.double[]Copies all values in an array of double precision floating point numbers.booleanReturnstrueif the given object is a vector containing the same values than this vector.voidSets a range of elements to the given number.floatfloatValue(int index) Returns the value at the given index as afloat.float[]Copies all values in an array of single precision floating point numbers.abstract Numberget(int index) Returns the number at the given index, ornullif none.Returns the type of elements in this vector.intReturns a hash code for the values in this vector.increment(double tolerance) Returns the increment between all consecutive values if this increment is constant, ornullotherwise.intintValue(int index) Returns the value at the given index as anint.booleanReturnstrueif this vector is empty or contains onlyNaNvalues.booleanReturnstrueif this vector contains only integer values.abstract booleanisNaN(int index) Returnstrueif the value at the given index isnullorNaN.booleanReturnstrueif values in this vector can be casted to single-precision floating point numbers (float) without precision lost.booleanReturnstrueif integer values shall be interpreted as unsigned values.longlongValue(int index) Returns the value at the given index as along.pick(int... indices) Returns a view which contains the values of this vector at the given indexes.NumberRange<?>range()Returns the minimal and maximal values found in this vector.repeat(boolean eachValue, int count) Returns a vector whose value is the content of this vector repeated count times.int[]repetitions(int... candidates) Detects repetition patterns in the values contained in this vector.final Vectorreverse()Returns a view which contains the values of this vector in reverse order.abstract NumberSets the number at the given index.shortshortValue(int index) Returns the value at the given index as ashort.abstract intsize()Returns the number of elements in this vector.abstract StringstringValue(int index) Returns a string representation of the value at the given index.final VectorsubList(int lower, int upper) Returns a view which contain the values of this vector in the given index range.subSampling(int first, int step, int length) Returns a view which contain the values of this vector in a given index range.Returns a string representation of this vector.transform(double scale, double offset) Returns a view of this vector with all values transformed by the given linear equation.Methods inherited from class AbstractList
add, add, addAll, clear, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRangeMethods inherited from class AbstractCollection
addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArrayMethods inherited from class Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface Collection
parallelStream, removeIf, stream, toArrayMethods inherited from interface List
addAll, contains, containsAll, isEmpty, remove, removeAll, replaceAll, retainAll, sort, spliterator, toArray, toArray
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Constructor Details
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Vector
protected Vector()For subclasses constructor.
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Method Details
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create
Wraps the given object in a vector. The argument should be one of the following:- An array of a primitive type, like
float[]. - A
Number[]array. - A
String[]array (not recommended, but happen with some file formats). - A
Vector, in which case it is returned unchanged. - A
Bufferbacked by an array. - The
nullvalue, in which casenullis returned.
Unsigned integers
Java has no primitive support for unsigned integers. But some file formats use unsigned integers, which can be simulated in Java by the use of bit masks or methods likeInteger.toUnsignedLong(int). ThisVectorclass applies automatically those masks (unless otherwise noticed in method Javadoc) if theisUnsignedargument istrue. That argument applies only tobyte[],short[],int[]orlong[]arrays and is ignored for all other kind of arrays.- Parameters:
array- the object to wrap in a vector, ornull.isUnsigned-trueif integer types should be interpreted as unsigned integers.- Returns:
- the given object wrapped in a vector, or
nullif the argument wasnull. - Throws:
IllegalArgumentException- if the type of the given object is not recognized by the method.
- An array of a primitive type, like
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create
Wraps the given array of floating point values. This method does not clone the array: changes in the given array will be reflected in the returned vector and vice-versa. This method is equivalent tobut potentially faster.create(array, false)- Parameters:
array- the array of floating point values to wrap in a vector, ornull.- Returns:
- the given array wrapped in a vector, or
nullif the argument wasnull. - Since:
- 1.0
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createForDecimal
Wraps the givenfloat[]array in a vector that preserve the string representations in base 10. For example, the 0.1floatvalue casted todoublenormally produces 0.10000000149011612 because of the way IEEE 754 arithmetic represents numbers (in base 2 instead of base 10). But the vector returned by this method will convert the 0.1floatvalue into the 0.1doublevalue. Note that despite the appearance, this is not more accurate than the normal cast, because base 10 is not more privileged in nature than base 2.When to use
This method can be used when there is good reasons to think that thefloatnumbers were parsed from decimal representations, for example an ASCII file. There is usually no reason to use this method if the values are the result of some numerical computations.- Parameters:
array- the array of floating point values to wrap in a vector, ornull.- Returns:
- the given array wrapped in a vector, or
nullif the argument wasnull. - See Also:
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createSequence
Creates a sequence of numbers in a given range of values using the given increment. The range of values will befirstinclusive to(first + increment*length)exclusive. Note that the value given by thefirstargument is equivalent to a "lowest" or "minimum" value only if the given increment is positive.The element type will be inferred from the type of the given
Numberinstances. If will typically beInteger.classfor the [100:1:120] range andDouble.classfor the [0:0.1:1] range.- Parameters:
first- the first value, inclusive.increment- the difference between the values at two adjacent indexes.length- the length of the desired vector.- Returns:
- the given sequence as a vector.
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getElementType
Returns the type of elements in this vector. If this vector is backed by an array of a primitive type, then this method returns the wrapper class, not the primitive type. For example if this vector is backed by an array of typefloat[], then this method returnsFloat.class, notFloat.TYPE.The information returned by this method is only indicative; it is not guaranteed to specify accurately this kind of objects returned by the
get(int)method. There is various situations where the types may not match:- If this vector is unsigned, then the values returned by
get(int)will be instances of a type wider than the type used by this vector for storing the values. - If this vector has been created for decimal numbers,
then the values returned by
get(int)will use double-precision even if this vector stores the values as single-precision floating point numbers. - If this vector has been compressed, then the type returned by this method does not describe accurately the range of values that this vector can store.
Users of the
doubleValue(int)method do not need to care about this information sinceVectorwill perform automatically the type conversion. Users of other methods may want to verify this information for avoidingArithmeticException.- Returns:
- the type of elements in this vector.
- See Also:
- If this vector is unsigned, then the values returned by
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isSinglePrecision
public boolean isSinglePrecision()Returnstrueif values in this vector can be casted to single-precision floating point numbers (float) without precision lost. In case of doubt, this method conservatively returnsfalse.- Returns:
- whether values in this vector can be casted to
floatprimitive type. - Since:
- 1.1
- See Also:
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isInteger
public boolean isInteger()Returnstrueif this vector contains only integer values. This method may iterate over all values for performing this verification.- Returns:
trueif this vector contains only integer values.
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isUnsigned
public boolean isUnsigned()Returnstrueif integer values shall be interpreted as unsigned values. This method may returntruefor data stored inbyte[],short[],int[]orlong[]arrays, but never for data stored infloat[]anddouble[]arrays. The default implementation returnsfalse.Unless otherwise noticed in Javadoc, users do not need to care about this information since
Vectormethods will perform automatically the operations needed for unsigned integers.- Returns:
trueif the integer values shall be interpreted as unsigned values.
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size
public abstract int size()Returns the number of elements in this vector.- Specified by:
sizein interfaceCollection<Number>- Specified by:
sizein interfaceList<Number>- Specified by:
sizein classAbstractCollection<Number>- Returns:
- the number of elements in this vector.
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isEmptyOrNaN
public boolean isEmptyOrNaN()Returnstrueif this vector is empty or contains onlyNaNvalues.- Returns:
- whether this vector is empty or contains only
NaNvalues. - Since:
- 1.1
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isNaN
public abstract boolean isNaN(int index) Returnstrueif the value at the given index isnullorNaN.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
trueif the value at the given index isNaN.- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.
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doubleValue
public abstract double doubleValue(int index) Returns the value at the given index as adouble. This is the safest method since all primitive types supported byVectorare convertible to thedoubletype.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.- See Also:
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floatValue
public float floatValue(int index) Returns the value at the given index as afloat. This method may result in a lost of precision if this vector stores or computes its values with thedoubletype.The default implementation delegates to
doubleValue(int)and cast the result tofloat.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.- See Also:
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longValue
public long longValue(int index) Returns the value at the given index as along. If this vector uses floating point values, the value is rounded to the nearest integer.The default implementation delegates to
doubleValue(int)and verifies if the result can be rounded to alongwith an error not greater than 0.5. Subclasses that store or compute their values with an integer type should override this method.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.ArithmeticException- if the value is too large for the capacity of thelongtype.
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intValue
public int intValue(int index) Returns the value at the given index as anint. If this vector uses floating point values, the value is rounded to the nearest integer.The default implementation delegates to
longValue(int)and verifies if the result fits in theinttype. Subclasses that store or compute their values with theint,shortorbytetype should override this method.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.ArithmeticException- if the value is too large for the capacity of theinttype.
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shortValue
public short shortValue(int index) Returns the value at the given index as ashort. If this vector uses floating point values, the value is rounded to the nearest integer.The default implementation delegates to
longValue(int)and verifies if the result fits in theshorttype. Subclasses that store or compute their values with theshortorbytetype should override this method.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.ArithmeticException- if the value is too large for the capacity of theshorttype.
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byteValue
public byte byteValue(int index) Returns the value at the given index as abyte. If this vector uses floating point values, the value is rounded to the nearest integer.The default implementation delegates to
longValue(int)and verifies if the result fits in thebytetype. Subclasses that store or compute their values with thebytetype should override this method.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index.
- Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NullPointerException- if the value isnull(never happen if this vector wraps an array of primitive type).NumberFormatException- if the value is stored as aStringand cannot be parsed.ArithmeticException- if the value is too large for the capacity of thebytetype.
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stringValue
Returns a string representation of the value at the given index. Invoking this method is generally equivalent to invokingString.valueOf(get(index))except if the values are unsigned integers.- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- a string representation of the value at the given index (may be
null). - Throws:
IndexOutOfBoundsException- if the given index is out of bounds.- See Also:
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get
Returns the number at the given index, ornullif none. The object returned by this method is usually an instance of the class returned bygetElementType(), but may also be an instance of a wider type if this is necessary for representing the values.Example: ifThe class of returned objects should be stable. For example, this method should not use different types for different range of values. This stability is recommended but not guaranteed becausegetElementType()returnsByte.classbutisUnsigned()returnstrue, then this method will rather return instances ofShortbecause that type is the smallest Java primitive type capable to hold byte values in the [0 … 255] range. But the elements are still stored internally asbyte, and the vector cannot accept values outside the [0 … 255] range even if they are validShortvalues.Vectorcan also wrap arbitraryNumber[]arrays.- Specified by:
getin interfaceList<Number>- Specified by:
getin classAbstractList<Number>- Parameters:
index- the index in the [0 … size-1] range.- Returns:
- the value at the given index (may be
null). - Throws:
IndexOutOfBoundsException- if the given index is out of bounds.NumberFormatException- if the value is stored as aStringand cannot be parsed.
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set
Sets the number at the given index. The given number should be an instance of the same type than the number returned byget(int). If not, the stored value may lost precision as a result of the cast.- Specified by:
setin interfaceList<Number>- Overrides:
setin classAbstractList<Number>- Parameters:
index- the index in the [0 … size-1] range.value- the value to set at the given index.- Returns:
- the value previously stored at the given index.
- Throws:
UnsupportedOperationException- if this vector is read-only.IndexOutOfBoundsException- if the given index is out of bounds.NumberFormatException- if the previous value was stored as aStringand cannot be parsed.IllegalArgumentException- if this vector uses some compression technic and the given value is out of range for that compression.
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fill
Sets a range of elements to the given number. Invoking this method is equivalent to invokingset(int, Number)in a loop, but potentially much more efficient.- Parameters:
fromIndex- index of the first element (inclusive) to be filled with the specified value.toIndex- index of the last element (exclusive) to be filled with the specified value.value- the value to be stored in elements of the vector.- Since:
- 1.1
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repetitions
public int[] repetitions(int... candidates) Detects repetition patterns in the values contained in this vector. The repetitions detected by this method are patterns that at repeated at a regular interval on the whole vector; this method does not search for repetitions occurring at irregular intervals. This method returns an array of typically 0, 1 or 2 elements where zero element means that no repetition has been found, one element describes a repetition (see the example below), and two elements describes a repetition of the repetitions (examples below). More elements (deeper recursivity) are theoretically possible but not yet implemented.If the values in this vector are of the form (x, x, …, x, y, y, …, y, z, z, …, z, …), then the first integer in the returned array is the number of consecutive x values before the y values. That number of occurrences must be the same than the number of consecutive y values before the z values, the number of consecutive z values before the next values, and so on until the end of the vector.
Examples: in the following vector, each value is repeated 3 times. So the array returned by this method would beFor the next level (the second integer in the returned array), this method represents above repetitions by single entities then reapplies the same repetition detection. This method processes has if the (x, x, …, x, y, y, …, y, z, z, …, z, …) vector was replaced by a new (x, y, z, …) vector, then the same detection algorithm was applied recursively.{4}, meaning that the first number appears 4 times, followed by a new number appearing 4 times, followed by a new number appearing 4 times, and so on until the end of the vector.10, 10, 10, 10, 12, 12, 12, 12, 15, 15, 15, 15
Examples: in the following vector, each value is repeated 2 times, then the sequence of 12 values is itself repeated 2 times. So the array returned by this method would be{3,4}, meaning that the first number appears 3 times, followed by a new number appearing 3 times, etc. until we counted 4 groups of 3 numbers. Then the whole sequence is repeated until the end of the vector.10, 10, 10, 12, 12, 12, 15, 15, 15, 18, 18, 18, 10, 10, 10, 12, 12, 12, 15, 15, 15, 18, 18, 18, 10, 10, 10, 12, 12, 12, 15, 15, 15, 18, 18, 18
This method is useful for analyzing the localization grid provided by some files (for example in netCDF format). Those grids sometimes have constant longitude for the same column index, or constant latitude for the same row index. This method can detect such regularity, which allows more efficient handling of the grid to CRS transform.
- Parameters:
candidates- probable values, ornullor an empty array if unknown. If non-empty, those values will be used for narrowing the search, which may improve performances. There is no guarantee that the values returned by this method will be among the given candidates.- Returns:
- the number of times that entities (numbers, or group of numbers) appears consecutively with identical values. If no such repetition is found, an empty array.
- Since:
- 1.0
- See Also:
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increment
Returns the increment between all consecutive values if this increment is constant, ornullotherwise. If the returned value is non-null, then the following condition shall hold for all values of i in the [0 …size()- 1] range:
The tolerance threshold can be zero if exact matches are desired. The return value (if non-null) is always a signed value, even if this vector is unsigned.abs(doubleValue(i) - (doubleValue(0) + increment*i)) ≤ tolerance- Parameters:
tolerance- the tolerance threshold for verifying if the increment is constant.- Returns:
- the increment as a signed value, or
nullif the increment is not constant.
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range
Returns the minimal and maximal values found in this vector.- Returns:
- minimal and maximal values found in this vector.
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subList
Returns a view which contain the values of this vector in the given index range. The returned view will contain the values from indexlowerinclusive toupperexclusive.Implementation note: this method delegates its worksubSampling(lower, 1, upper - lower). This method is declared final in order to force subclasses to overridesubSampling(…)instead.- Specified by:
subListin interfaceList<Number>- Overrides:
subListin classAbstractList<Number>- Parameters:
lower- index of the first value to be included in the returned view.upper- index after the last value to be included in the returned view.- Returns:
- a view of this vector containing values in the given index range.
- Throws:
IndexOutOfBoundsException- if an index is outside the [0 … size-1] range.
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subSampling
Returns a view which contain the values of this vector in a given index range. The returned view will contain the values from indexfirstinclusive to(first + step*length)exclusive with index incremented by the givenstepvalue, which can be negative. More specifically the index i in the returned vector will maps the element at index(first + step*i)in this vector.This method does not copy the values. Consequently, any modification to the values of this vector will be reflected in the returned view and vice-versa.
- Parameters:
first- index of the first value in this vector to be included in the returned view.step- the index increment between values in this vector to be included in the returned view. Can be positive, zero or negative.length- the length of the view to be returned. Cannot be greater than the length of this vector, except if thestepis zero.- Returns:
- a view of this vector containing values in the given index range.
- Throws:
IndexOutOfBoundsException- iffirstorfirst + step*(length-1)is outside the [0 … size-1] range.
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pick
Returns a view which contains the values of this vector at the given indexes. This method does not copy the values, consequently any modification to the values of this vector will be reflected in the returned view and vice-versa.The indexes do not need to be in any particular order. The same index can be repeated more than once. Thus it is possible to create a vector larger than the original vector.
- Parameters:
indices- indexes of the values to be returned.- Returns:
- a view of this vector containing values at the given indexes.
- Throws:
IndexOutOfBoundsException- if at least one index is out of bounds.
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concatenate
Returns the concatenation of this vector with the given one. Indexes in the [0 …size- 1] range will map to this vector, while indexes in the [size…size+toAppend.size] range while map to the given vector.- Parameters:
toAppend- the vector to concatenate at the end of this vector.- Returns:
- the concatenation of this vector with the given vector.
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repeat
Returns a vector whose value is the content of this vector repeated count times. The content can be repeated in two different ways:- If
eachValueistrue, then each value is repeatedcounttimes before to move to the next value. - If
eachValueisfalse, then whole vector is repeatedcounttimes.
Example: ifThis method returns an empty vector ifveccontains{1, 2, 3}, then:vec.repeat(true, 4)returns{1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3}.vec.repeat(false, 4)returns{1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3}.
countis zero and returnsthisifcountis one. For other positivecountvalues, this method returns an unmodifiable view of this vector: changes in this vector are reflected in the repeated vector.- Parameters:
eachValue- whether to apply the repetition on each value (true) or on the whole vector (false).count- number of repetitions as a positive number (including zero).- Returns:
- this vector repeated count time.
- Since:
- 1.0
- See Also:
- If
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reverse
Returns a view which contains the values of this vector in reverse order.Implementation note: this method delegates its work tosubSampling(size-1, -1, size). This method is declared final in order to force subclasses to overridesubSampling(…)instead.- Returns:
- the vector values in reverse order.
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transform
Returns a view of this vector with all values transformed by the given linear equation. Ifscale= 1 andoffset= 0, then this method returnsthis. Otherwise this method returns a vector where each value at index i is computed bydoubleValue(i)×scale+offset. The values are computed on-the-fly; they are not copied.- Parameters:
scale- the scale factor to apply on each value, or 1 if none.offset- the offset to apply on each value, or 0 if none.- Returns:
- a vector with values computed by
doubleValue(i)×scale+offset. - Throws:
IllegalArgumentException- if an argument is NaN or infinite.- Since:
- 1.0
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compress
Returns a vector with the same data than this vector but encoded in a more compact way, orthisif this method cannot do better than currentVectorinstance. Examples:- Vector is backed by an
int[]array while values could be stored asshortvalues. - Vector contains increasing or decreasing values with a constant delta between consecutive values.
create(Object, boolean)method. Since the returned array may be a copy ofthisarray, caller should not retain reference tothisor reference to the backing array after this method call (otherwise an unnecessary duplication of data may exist in memory).When to use
It is usually not worth to compress small arrays. Performance-critical arrays may not be compressed neither. This method is best suited for vectors that may potentially be large and for which the cost of fetching values in that vector is small compared to the calculation performed with the values.- Parameters:
tolerance- maximal difference allowed between original and compressed vectors (can be zero).- Returns:
- a more compact vector with the same data than this vector, or
this.
- Vector is backed by an
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buffer
Returns the vector data as ajava.niobuffer. Data are not copied: changes in the buffer are reflected on this vector and vice-versa. Date are provided in their "raw" form. For example, unsigned integers are given as plainintelements and it is caller responsibility to useInteger.toUnsignedLong(int)if needed.- Returns:
- the vector data as a buffer. Absent if this vector is not backed by an array or a buffer.
- Since:
- 1.0
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doubleValues
public double[] doubleValues()Copies all values in an array of double precision floating point numbers. This method is for inter-operability with APIs requiring an array of primitive type.The default implementation invokes
doubleValue(int)for all indices from 0 inclusive tosize()exclusive. Subclasses may override with more efficient implementation.- Returns:
- a copy of all floating point values in this vector.
- See Also:
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floatValues
public float[] floatValues()Copies all values in an array of single precision floating point numbers. This method is for inter-operability with APIs requiring an array of primitive type.The default implementation invokes
floatValue(int)for all indices from 0 inclusive tosize()exclusive. Subclasses may override with more efficient implementation.- Returns:
- a copy of all floating point values in this vector.
- See Also:
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toString
Returns a string representation of this vector.- Overrides:
toStringin classAbstractCollection<Number>- Returns:
- a string representation of this vector.
- See Also:
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hashCode
public int hashCode()Returns a hash code for the values in this vector. The hash code is computed as if this vector was converted to an array ofNumbers, then theArrays.hashCode(Object[])method invoked for that array. This contract is defined for compatibility withList.hashCode()contract.- Specified by:
hashCodein interfaceCollection<Number>- Specified by:
hashCodein interfaceList<Number>- Overrides:
hashCodein classAbstractList<Number>- Returns:
- a hash code value for the values in this vector.
- Since:
- 1.0
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equals
Returnstrueif the given object is a vector containing the same values than this vector. This method performs the comparison as if the two vectors where converted to arrays ofNumbers, then theArrays.equals(Object[], Object[])method invoked for those arrays.- Specified by:
equalsin interfaceCollection<Number>- Specified by:
equalsin interfaceList<Number>- Overrides:
equalsin classAbstractList<Number>- Parameters:
object- the other object to compare with this vector.- Returns:
trueif the given object is a vector containing the same values than this vector.- Since:
- 1.0
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