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Re: Need help with HDF_VD_WRITE!!! [message #32497 is a reply to message #32491]

Fri, 11 October 2002 09:03

Liam E. Gumley
Messages: 378
Registered: January 2000

Senior Member

> Brian Huether wrote:
>
> I thought I had it. But man this is so complicated. Say I have one
> column of data with one field. All the following fail:
>
> IDL> fileid=HDF_OPEN('e:\huether\test7.hdf',/CREATE)
> IDL> Vdat = HDF_VD_ATTACH(fileID, -1, /WRITE)
> IDL> HDF_VD_WRITE, Vdat, 'PX', indgen(1,10)
[stuff deleted]

Have you considered using the HDF Scientific Data Set model instead?
It's much more flexible and easy to use IMHO. For example:

;- Create the file
hdfid = hdf_sd_start('test.hdf', /create)
varid = hdf_sd_create(hdfid, 'SS', [10, 10], /float)
hdf_sd_adddata, varid, findgen(10, 10)
hdf_sd_endaccess, varid
hdf_sd_end, hdfid

;- Read the file
hdfid = hdf_sd_start('test.hdf')
index = hdf_sd_nametoindex(hdfid, 'SS')
varid = hdf_sd_select(hdfid, index)
hdf_sd_getdata, varid, data
hdf_sd_endaccess, varid
hdf_sd_end, hdfid

For more details see my book Chapter 4, pp. 182-192, or the HDF routines
at

http://www.gumley.com/PIP/Free_Software.html

Cheers,
Liam.
Practical IDL Programming
http://www.gumley.com/

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[Message index]

		Re: Need help with HDF_VD_WRITE!!! By: R.Bauer on Sun, 13 October 2002 06:13
		Re: Need help with HDF_VD_WRITE!!! By: Liam E. Gumley on Fri, 11 October 2002 09:03
		Re: Need help with HDF_VD_WRITE!!! By: Brian Huether on Fri, 11 October 2002 04:10
		Re: Need help with HDF_VD_WRITE!!! By: James Kuyper on Thu, 10 October 2002 08:35

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