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(Beginner) issue setting variables using ENVI_FILE_QUERY [message #86286]

Wed, 23 October 2013 03:05

Simon Mitchell
Messages: 6
Registered: October 2013

Junior Member

Hello All,

I am having an issue when using ENVI_FILE_QUERY to set a variable containing the number of samples and number of lines from an opened image. This is possibly a very simple mistake that I am making, but I cannot see where I am going wrong (I am new to IDL, but having to update old existing code).

My code loops through a directory and opens .TIF images, to perform processing on.

------------------------------------------------------------ -------------
PRO CALL_HOTSPOT

COMMON PARAM, ns, nl, ifname, ofname, w, yd1, iyd, ib, yy
COMMON NAMES, opendir
COMMON LOOP, count_str

;Scan the tif_output directory for all files
tifdir = opendir + 'Tif_Output\'
CD, tifdir

tif_files = FILE_SEARCH('*.tif', COUNT = numfiles)
counter = 0

WHILE (counter LT numfiles) DO BEGIN

count_str = STRTRIM(STRING(counter), 2)

ifname = tif_files(counter)
OPENR, lun_tif, ifname, /GET_LUN

;determine the number of samples and lines

ENVI_FILE_QUERY, lun_tif, NS=ns, NL=nl

print, ns

; Call the TET algorithm
TET_HOTSPOT_IDL_MAIN_SIMULATION_SM

CLOSE, lun_tif
FREE_LUN, lun_tif

counter = counter + 1

ENDWHILE

END
------------------------------------------------------------ -------------

The error that I am getting is:
% PRINT: Variable is undefined: NS (PARAM).

Would anyone be able to help me with this?

Thanks in advance

Simon

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[Message index]

		(Beginner) issue setting variables using ENVI_FILE_QUERY By: Simon Mitchell on Wed, 23 October 2013 03:05
		Re: (Beginner) issue setting variables using ENVI_FILE_QUERY By: David Fanning on Wed, 23 October 2013 06:28
		Re: (Beginner) issue setting variables using ENVI_FILE_QUERY By: Simon Mitchell on Wed, 23 October 2013 07:21
		Re: (Beginner) issue setting variables using ENVI_FILE_QUERY By: David Fanning on Wed, 23 October 2013 07:42
		Re: (Beginner) issue setting variables using ENVI_FILE_QUERY By: Josh Sixsmith on Fri, 25 October 2013 05:04

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