org.das2.qds.util.LSpec

Form a rank 2 dataset with L and Time for tags by identifying monotonic sweeps in two rank 1 datasets, and interpolating along the sweep.

USER_PROP_SWEEPS

identifies the sweep of each record

DIR_INWARD

just the inward sweeps

DIR_OUTWARD

just the outward sweeps

DIR_BOTH

include both sweeps

identifySweeps

identifySweeps( QDataSet lds, int dir ) → QDataSet

identify monotonically increasing or decreasing segments of the dataset.

Parameters

lds - the dataset which sweeps back and forth, such as LShell or MagLat (or a sine wave for testing).
dir - 0=both 1=outward 2= inward

Returns:

rank 2 data set of sweep indeces, dim0 is sweep number, dim1 is two-element [ start, end(inclusive) ].

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rebin

rebin( QDataSet lds, QDataSet zds, QDataSet lgrid ) → QDataSet

rebin the datasets to rank 2 dataset ( time, LShell ), by interpolating along sweeps. This dataset has the property "sweeps", which is a dataset that indexes the input datasets.

Parameters

lds - rank 1 dataset of length N
zds - rank 1 dataset of length N, indexed along with {@code lds}
lgrid - rank 1 dataset indicating the dim 1 tags for the result dataset.

Returns:

a rank 2 dataset, with one column per sweep, interpolated to {@code lgrid}

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rebin( QDataSet tlz, QDataSet lgrid, int dir ) → QDataSet
rebin( QDataSet tt, QDataSet lds, QDataSet zds, QDataSet tspace, QDataSet lgrid, int dir ) → QDataSet
rebin( QDataSet lds, QDataSet zds, QDataSet lgrid, int dir ) → QDataSet