Re: [ferret_users] aline colors

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Derek
The command

ppl color n,r,g,b

will change the color of the given pen number to the red,green,blue colors you give it.  So the trick is to change a pen you're not going to otherwise use, to gray.  If I'm not going to have any red lines, then I can say

ppl color,2,70,70,70

which will make that pen gray.

To mark a grid on your plot, an easier way than ALINE is to use the /GRATICULE qualifier on your plot command.  (See the on-line demo of this http://ferret.pmel.noaa.gov/FERRET_17sep07/Demos/graticules/graticules_demo.html)

You might do:

yes? use coads_climatology
yes? ppl color 2,70,70,70
yes? FILL/GRAT=(color=2) sst[L=1]

If this is not what you want, there are also other scripts for drawing grid lines at all the coordinate values. To see details of a couple of these try

yes? go/help gridlines

yes? go/help gridxy

and for a complete list of these scripts,  the Unix command

>Fgo grid  (some are for other purposes, but you'll be able to see that from the listing.)

Derek Tsui wrote:

Dear Ferret Users,

 

I am trying to draw grid lines using ppl aline, however I can't seem to control the line colors. I am trying to get a grey line color. I've looked at ppl pen and ppl color but was unable to find such color. Does anyone have any idea how I can draw grey grid lines?

 

Thanks,
Derek