Black Display Box

[Mark Wang]

>Hello,
>I downloaded the GRADs package onto a Linux Enterprise system.  I am able
>to open and query files from the prompt command w/o errors, however, when
>I try to display a variable the Display Box remains blank, i.e. no
>graphics.
>The command line states the following for a terrain plot:
>display ter
>contouring -0 to 3500 interval 500
>It appears as if the software is executing the command, but I can't see
>any output.
>I'm not sure what is causing the display problem since I'm not getting an
>error.  Is this an X11 issue?  Any suggestions would be appreciated.
>Thanks,
>Dawn Froning
>Mo. Dept. Nat. Resources

Hi Dawn Froning
I think the problem is there are too many data in the same value.
And another different data are around the drawing domain.
You can try to do this:
'set gxout grid'
It will display all of your grid digital data.
If your data are large, try to do this:
'set gxout shaded'
'run cbar.gs'
Then you can see your data in shaded type.
Or you can try to lower your contour interval:
'set cint 100'
Then you may see some contours.
These methods may help you to know something.

Mark