[ferret_users] pen color and postscript

[Emilie Vanvyve <vanvyve@xxxxxxxxxxxxxx>]

Hello,

I have a problem someone might have experienced. All clues and  
solutions welcome!

I plot a sounding of the temperature. The vertical axis (initially  
sigma coordinate) is transformed into a logarithmic axis (pressure).  
This implies that the axis labels are 2 (=10**2), 3 (=10**3), etc.
I don't want these numbers to appear, I want labels in hPa: 1000,  
800, 600, 400, 200, 100, etc. I add these labels myself with a script  
(lopressureaxis here under). However, I need to erase first the "2"  
and "3". For this, I use a "white" pen and overwrite the numbers.
It works perfectly on the screen but not in the saved postscript. The  
white colour is converted back to black and so my labels "2" and "3"  
appear together with "1000 hPa" and "100 hPa".

The script doing this is as follows (unuseful parts removed):

plot/nolabel/vlimit=3:1.85:-1/i=7:40/vs/line/set temp1,pressure1
  go layout* ; ppl xaxis -90,40,20 ; ppl xfor (i3) ; ppl yfor (i1) ;  
ppl plot

  pplus color 1 100 100 100  !transform the black pen into a white pen
  label -93, 3.015, 1,, 0.20 "@P73" ; label -93.5, 3.015, 1,, 0.20  
"@P73"  !overwrite "3" in white
  label -93, 2.015, 1,, 0.20 "@P72" ; label -93.5, 2.015, 1,, 0.20  
"@P72"  !overwrite "2" in white
  pplus color 1   0   0   0  !get the black ben back to its normal  
state

  go logpressureaxis** -90 -92 40 42 -95  !display labels for the  
vertical axis

plot/nolabel/over/symbol=01/size=0.18/vs temp2,pressure2  !add  
another temperature sounding
...

(* the script layout sets bigger font sizes, etc.)

Does the problem occur because I use the black pen? Is there another  
way to prevent Ferret from displaying "2" and "3" on the vertical axis?

Thanks in advance for any idea!
Emilie V.