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Re: File unit problems [message #56559]

Mon, 29 October 2007 04:25

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

On Oct 29, 4:08 am, Sheldon <shejo...@gmail.com> wrote:
> Hi!
>
> I am having some trouble with the file unit in IDL. I have included
> the part of code that the error occurrs.
>
> FOR f = 0, 1 DO BEGIN
> IF f EQ 0 THEN BEGIN
> OPENR, 1, land_lut, /GET_LUN; IDL says that this line is
> incorrect. See error message below.
> TITLESTR="Unmodified Class probability LUT for Land (Perhaps
> erroneous)"
> OPENW, 2, "land_scat_clas_tuned.dat", /GET_LUN
> FILESTR = "land_scat_clas_tuned.ps"
> ENDIF ELSE BEGIN
> TITLESTR = "Unmodified Class probability LUT for Ocean
> (Perhaps erroneous)"
> OPENR, 1, sea_lut, /GET_LUN
> OPENW, 2, "sea_scat_clas_tuned.dat", /GET_LUN
> FILESTR = "sea_scat_clas_tuned.ps"
> ENDELSE
> ....
>
> % OPENR: Expression must be named variable in this context: <INT
> ( 1)>.
>

Hi,

In addition to the solution Maarten points to, check out the language
of the error...

"Expression must be named variable in this context"

It is the "named variable" part that indicates you must provide a
variable to which the routine will assign a value.

This is the kind of language you'll see pop up in IDL's reference docs
all the time.

Cheers,
Ben

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[Message index]

		Re: File unit problems By: ben.bighair on Mon, 29 October 2007 04:25
		Re: File unit problems By: Liberum on Mon, 29 October 2007 03:10
		Re: File unit problems By: Maarten[1] on Mon, 29 October 2007 03:02

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