Re: [ferret_users] pen color and postscript

[Jaison Kurian <jaison@xxxxxxxxxxxxxxxxxx>]

Hi Emilie,
            Few questions and few suggestions ...

 Questions
     1. How do you convert ps file to tiff? Using "convert" command?
     2. How does the ps file look like in gv (ghostview) ?
     3. On the attached image, the tic for 100 hPa extends to both side
            of the axis. Is it intended or a shortcoming of present script ?

 Suggestions
     1. Instead of setting pen color from black to white, set the label
            size for Y-Axis (PPL AXLSZE xsize, ysize) to zero before making
            the plot. Then restore the Y-axis label size using the same 
            "PPL AXLSZE" command just before calling logpressureaxis GO file.
     2. As above, you can handle the tic marks, if you want. 

I haven't checked this ...but it should work. 

Regards,

Jaison

On Fri, 12 Jan 2007, Emilie Vanvyve wrote:

> 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.
> 
> 
>