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envi_get_data [message #58173]

Mon, 21 January 2008 11:42

yychongzi
Messages: 6
Registered: September 2007

Junior Member

Hi, I am writing a program to calcualte a new image from an old one.
But I always get error about the envi_get_data.

The message reads:
% Variable is undefined: POS.
% Execution halted at: ENVI_GET_DATA

I got the same message even when I did not put 'pos=pos' in the
envi_get_data statement.

Thanks a lot. Here is the code:

pro cal
envi, /restore_base_save_files
envi_init, /batch_mode
envi_open_file,'E:\image1999',r_fid=fid
if (fid eq -1) then return
envi_file_query, fid, ns=ns, nl=nl, nb=nb, pos=pos ,dims=dims
image=fltarr(nb,nl,ns)
image2=fltarr(nb,nl,ns)
image = envi_get_data (fid=fid,dims=dims, pos =pos)
For i=0, nb-1 Do Begin
For j=0,nl-1 Do Begin
For k=0,ns-1 Do Begin
image2[i,j,k]=image[i,j,k]* 0.8 + 100
Endfor
Endfor
Endfor
ENVI_WRITE_ENVI_FILE,image2,data_type=2,nb=nb,nl=nl,ns=ns, out_name='E:
\test.img'
END

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[Message index]

		envi_get_data By: yychongzi on Mon, 21 January 2008 11:42
		Re: envi_get_data By: lbusett@yahoo.it on Fri, 25 January 2008 06:03
		Re: envi_get_data By: peter.eddy@shaw.ca on Fri, 25 January 2008 09:18
		Re: envi_get_data By: Jean H. on Fri, 25 January 2008 13:49
		Re: envi_get_data By: yychongzi on Fri, 25 January 2008 13:25
		Re: envi_get_data By: woods1 on Tue, 15 September 2009 00:12
		Re: envi_get_data By: Robert Moss, PhD on Mon, 14 September 2009 11:59
		Re: envi_get_data By: Andrew Rodger on Fri, 02 October 2009 06:29
		Re: envi_get_data By: woods1 on Thu, 01 October 2009 09:48
		Re: envi_get_data By: David Fanning on Wed, 30 September 2009 07:34
		Re: envi_get_data By: woods1 on Wed, 30 September 2009 07:14
		Re: envi_get_data By: wita on Wed, 30 September 2009 02:39
		Re: envi_get_data By: woods1 on Wed, 30 September 2009 01:25
		Re: envi_get_data By: woods1 on Wed, 30 September 2009 01:09
		Re: envi_get_data By: woods1 on Wed, 30 September 2009 01:02
		Re: envi_get_data By: Chris Jengo on Tue, 29 September 2009 07:40
		Re: envi_get_data By: David Fanning on Tue, 29 September 2009 06:18
		Re: envi_get_data By: lefsky@gmail.com on Mon, 12 November 2012 14:02
		Re: envi_get_data By: lefsky@gmail.com on Sun, 11 November 2012 20:22

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