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reading binary file with READ_BINARY [message #86190]

Thu, 17 October 2013 05:00

mishooax
Messages: 1
Registered: October 2013

Junior Member

Folks,

I am trying to read a binary file in IDL containing a simple 2D array of 360x180 values. For reference, the binary file can be found here:

http://transcom.project.asu.edu/download/transcom03/smoothma p.fix.2.bin

Here is what the readme for this .bin says:

The file 'smoothmap.fix.2.bin' contains a single real, binary
array dimensioned 360 x 180. The array contains the numbers 1
through 22, denoting each of the 22 basis functions in the
TransCom 3 experiment. This file was written on an SGI Origin
2000 hosting UNIX.

And my code:

GET_LUN, fstart
OPENR, fstart, FFilename

mask_data = READ_BINARY(fstart, DATA_DIMS=[360,180], DATA_TYPE=4) ; float data

Now mask_data contains only junk values:
print, mask_data[0:100] gives
-2.24089e-038 0.000000 0.000000 0.000000 ....

Why would that be?

Also, I've noticed the .bin file size is 259208 bytes, aka 8 bytes more than the space required to store a 360x180 float array. I've been looking at this for an hour now and I'm stumped. Played around with endian-ness settings but that did not help.

How can I read in this file correctly?

Thank you!

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[Message index]

		reading binary file with READ_BINARY By: mishooax on Thu, 17 October 2013 05:00
		Re: reading binary file with READ_BINARY By: David Fanning on Thu, 17 October 2013 06:46
		Re: reading binary file with READ_BINARY By: zzhaoch on Wed, 17 December 2014 14:32

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