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matlab.io.hdfeos.gd.writeAttr

Namespace: matlab.io.hdfeos.gd

Write grid attribute

Syntax

writeAttr(gridID,attrname,data)

Description

writeAttr(gridID,attrname,data) writes an attribute to a grid. If the attribute does not exist, it is created. If the attribute exists, it can be modified in place, but it cannot be recreated with a different data type or length.

This function corresponds to the GDwriteattr function in the HDF-EOS library C API.

Examples

import matlab.io.hdfeos.*
srcFile = fullfile(matlabroot,"toolbox","matlab","matlab_sci","hdf4","grid.hdf");
copyfile(srcFile,"myfile.hdf")
fileattrib("myfile.hdf","+w")
gfid = gd.open("myfile.hdf","rdwr");
gridID = gd.attach(gfid,"PolarGrid");
gd.writeAttr(gridID,"modification_date",datestr(now))
gd.detach(gridID)
gd.close(gfid)

See Also