org.das2.qds.SubsetDataSet

Extracts a subset of the source dataset by using a rank 1 subset of indeces on each index.

SubsetDataSet( QDataSet source )

create a subSetDataSet for the source, which is read for applyIndex calls which reduce each index.

applyIndex

applyIndex( int idim, QDataSet idx ) → void

apply the subset indexes to a given dimension. For example, if a=[10,20,30,40] then applyIndex( 0, [1,2] ) would result in [20,30].

Parameters

idim - an int
idx - the rank 1 index list, for example from where on a rank 1 dataset.

Returns:

void (returns nothing)

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length

length( ) → int

Returns:

int

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length

length( int i ) → int

Parameters

i - an int

Returns:

int

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length

length( int i, int j ) → int

Parameters

i - an int
j - an int

Returns:

int

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length

length( int i, int j, int k ) → int

Parameters

i - an int
j - an int
k - an int

Returns:

int

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parseIndices

parseIndices( String spec, int dimlen ) → int[]

parse the string spec into a list of indices. The spec is a comma-delineated list containing any combination of:

index, with negative indices relative to the end.
start:stop, with stop exclusive.
start:stop:stride, incrementing stride elements, including negative.
start-stopInclusive, where the trailing index is also included.

If the spec starts with ~, then these indices are removed. For example:

~5, remove the 5th index.
~15:20, remove the 5 indices starting at 15.
~-1, remove the last index.

Note if invert is present, then the indices cannot be reversed.

Parameters

spec - a String
dimlen - an int

Returns:

the list of integers.

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property

property( String name, int i ) → Object

Parameters

name - a String
i - an int

Returns:

java.lang.Object

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property

property( String name ) → Object

Parameters

name - a String

Returns:

java.lang.Object

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rank

rank( ) → int

Returns:

int

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value

value( ) → double

Returns:

double

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value

value( int i ) → double

Parameters

i - an int

Returns:

double

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value

value( int i0, int i1 ) → double

Parameters

i0 - an int
i1 - an int

Returns:

double

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value

value( int i0, int i1, int i2 ) → double

Parameters

i0 - an int
i1 - an int
i2 - an int

Returns:

double

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value

value( int i0, int i1, int i2, int i3 ) → double

Parameters

i0 - an int
i1 - an int
i2 - an int
i3 - an int

Returns:

double

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