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Appending data to a preexisting SD dataset in an HDF file [message #31102]

Fri, 14 June 2002 13:28

Sean Raffuse
Messages: 46
Registered: July 2001

Member

Hello,

I would like to increase the size of a 3d array in an HDF file, adding more
data to the preexisting index. Is this possible? I know I can access the
dimensions of the array by using hdf_sd_dimget and the count keyword. That
count is what I would like to change. For example:

sd_id = HDF_SD_START(L1a_filename, /RDWR)
index = HDF_SD_NAMETOINDEX(sd_id, 'l1a_data')
sds_id=HDF_SD_SELECT(sd_id,index)
dim_id=HDF_SD_DIMGETID(sds_id,0)
HDF_SD_DIMGET, dim_id , COUNT=count

Is it possible to change the size of a particular dimension (count)? If
not, can I replace the entire SD with another of the same name and index?
I'm not sure if this is possible or not with hdf files.

Thanks in advance,

Sean Raffuse

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