matlab.io.hdf4.sd.refToIndex

Package: matlab.io.hdf4.sd

Index of data set corresponding to reference number

Syntax

idx = refToIndex(sdID,ref)


Description

idx = refToIndex(sdID,ref) returns the index of the data set identified by its reference number ref. The idx output can then be passed to sd.select, to obtain a data set identifier.

This function corresponds to the SDreftoindex function in the HDF library C API.

Examples

import matlab.io.hdf4.*
sdID = sd.start('sd.hdf','read');
idx = sd.nameToIndex(sdID,'temperature');
sdsID = sd.select(sdID,idx);
ref = sd.idToRef(sdsID);
idx2 = sd.refToIndex(sdID,ref);
sd.endAccess(sdsID);
sd.close(sdID);