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<title>example8.gri</title>
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<pre>
<font color=#B22222># Example 8 -- Plot T=T(x,rho) section of eubex data</font>
<font color=#0000EE>`Initialize Parameters'</font>
{
<font color=#0000EE>\FILE_DATA =</font> <font color=#2F4F4F>"example8a.dat"</font> <font color=#B22222># T vs rho</font>
<font color=#0000EE>\FILE_LOCN =</font> <font color=#2F4F4F>"example8b.dat"</font> <font color=#B22222># section distances</font>
set missing value -99.0
<font color=#B22222>#</font>
<font color=#B22222># Following values from ~/eubex/processing/to_rho_bins/do_rho_inter</font>
<font color=#0000EE>\RHO_MIN =</font> <font color=#2F4F4F>"28.1"</font>
<font color=#0000EE>\RHO_MAX =</font> <font color=#2F4F4F>"27.5"</font>
<font color=#0000EE>\RHO_INC =</font> <font color=#2F4F4F>"-0.002"</font>
<font color=#0000EE>\NY =</font> <font color=#2F4F4F>"301"</font>
<font color=#0000EE>\xmin =</font> <font color=#2F4F4F>"350"</font>
<font color=#0000EE>\xmax =</font> <font color=#2F4F4F>"0"</font>
<font color=#0000EE>\xinc =</font> <font color=#2F4F4F>"-100"</font>
<font color=#0000EE>\ymin =</font> <font color=#2F4F4F>"28.1"</font>
<font color=#0000EE>\ymax =</font> <font color=#2F4F4F>"27.8"</font>
<font color=#0000EE>\yinc =</font> <font color=#2F4F4F>"-0.1"</font>
<font color=#0000EE>\zmin =</font> <font color=#2F4F4F>"0"</font>
<font color=#0000EE>\zmax =</font> <font color=#2F4F4F>"2.5"</font>
}
<font color=#0000EE>`Initialize Axes'</font>
/*
Set up axes
*/
{
set x name <font color=#2F4F4F>"km"</font>
set x size 10
set x axis<font color=#0000EE> \xmin</font><font color=#0000EE> \xmax</font><font color=#0000EE> \xinc
</font> set y name <font color=#2F4F4F>"$\sigma_T$"</font>
set y size 5
set y axis name horizontal
set y axis<font color=#0000EE> \ymin</font><font color=#0000EE> \ymax</font><font color=#0000EE> \yinc
</font> set y format <font color=#2F4F4F>"%.1f"</font>
}
<font color=#0000EE>`Initialize Files'</font>
{
query<font color=#0000EE> \data</font> <font color=#2F4F4F>"Data file? " ("\FILE_DATA"</font>)
query<font color=#0000EE> \locn</font> <font color=#2F4F4F>"Station locn?" ("\FILE_LOCN"</font>)
}
<font color=#0000EE>`Read Data'</font>
{
<font color=#B22222># Read x-locations</font>
<font color=#9400D3>system</font> <font color=#FF0000>awk '{print $2}' <<font color=#0000EE> \locn</font> > TMP</font>
<font color=#9400D3>system</font> <font color=#FF0000>wc TMP | awk '{print $1}' > NUM</font>
open NUM
read<font color=#CDAD00> .gridx_number.</font>
close
<font color=#9400D3>system</font> <font color=#FF0000>rm NUM </font>
open TMP
read grid x<font color=#CDAD00> .gridx_number.</font>
close
<font color=#9400D3>system</font> <font color=#FF0000>rm TMP</font>
<font color=#B22222># Create y-locations</font>
set y grid<font color=#0000EE> \RHO_MIN</font><font color=#0000EE> \RHO_MAX</font><font color=#0000EE> \RHO_INC
</font> <font color=#B22222>#</font>
<font color=#B22222># Read data</font>
open<font color=#0000EE> \data
</font> read grid data<font color=#0000EE> \NY<font</font> color=#CDAD00> .gridx_number.</font>
close
}
<font color=#0000EE>`Plot Contours'</font>
{
set graylevel<font color=#CDAD00> .contour_graylevel.</font>
set clip on
set line width 0.5
draw contour -3 3 0.25 unlabelled
<font color=#B22222>#</font>
<font color=#B22222># wide line at 0 degrees</font>
set line width 2
draw contour 0 unlabelled
}
<font color=#0000EE>`Plot Image And Maybe Contours'</font>
{
<font color=#0000EE>\imagefile =</font> <font color=#2F4F4F>"image"</font>
set image range<font color=#0000EE> \zmin</font><font color=#0000EE> \zmax
</font> convert grid to image box<font color=#0000EE> \xmin</font> <font color=#0000EE> \ymin</font><font color=#0000EE> \xmax</font><font color=#0000EE> \ymax
</font> query<font color=#0000EE> \dohisto</font> <font color=#2F4F4F>"Do histogram scaling? (yes|no)" ("yes"</font>)
<font color=#0000EE>\incs =</font> <font color=#2F4F4F>"no"</font>
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\dohisto" =</font>= "yes"</font>}
set image grayscale using histogram
<font color=#9400D3>else</font>
<font color=#0000EE>\zinc =</font> <font color=#2F4F4F>"0.25"</font>
query<font color=#0000EE> \incs</font> <font color=#2F4F4F>"In linear scaling, band at an increment of<font color=#0000EE> \zinc?"</font> ("yes"</font>)
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\incs" =</font>= "yes"</font>}
set image grayscale black<font color=#0000EE> \zmin</font> white<font color=#0000EE> \zmax</font> increment<font color=#0000EE> \zinc
</font> <font color=#9400D3>else</font>
set image grayscale black<font color=#0000EE> \zmin</font> white<font color=#0000EE> \zmax
</font> <font color=#9400D3>end if</font>
<font color=#9400D3>end if</font>
write image rasterfile to<font color=#0000EE> \imagefile
</font> show <font color=#2F4F4F>"wrote image rasterfile `\imagefile '"</font>
draw image
draw image palette
query<font color=#0000EE> \do_contours</font> <font color=#2F4F4F>"Do contours as well (yes|no)" ("yes"</font>)
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\do_contours" =</font>= "yes"</font>}
Plot Contours
<font color=#9400D3>end if</font>
draw title <font color=#2F4F4F>"Example 8 --<font color=#0000EE> \data</font> black=\zmin white=\zmax"</font>
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\dohisto" =</font>= "yes"</font>}
draw title <font color=#2F4F4F>"Histogram enhanced grayscales"</font>
<font color=#9400D3>else</font>
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\incs" =</font>= "yes"</font>}
draw title <font color=#2F4F4F>"Grayscale banded at intervals of<font color=#0000EE> \zinc"</font>
</font> <font color=#9400D3>end if</font>
<font color=#9400D3>end if</font>
}
Initialize Parameters
Initialize Axes
Initialize Files
Read Data
query<font color=#0000EE> \doimage</font> <font color=#2F4F4F>"Draw image (yes|no)" ("no"</font>)
<font color=#9400D3>if</font> {<font color=#2F4F4F>"<font color=#0000EE>\doimage" =</font>= "yes"</font>}
<font color=#0000EE>.contour_graylevel. =</font> 1 <font color=#B22222># white contours </font>
Plot Image And Maybe Contours
<font color=#9400D3>else</font>
<font color=#0000EE>.contour_graylevel. =</font> 0 <font color=#B22222># black contours </font>
Plot Contours
draw title <font color=#2F4F4F>"Example 8"</font>
<font color=#9400D3>end if</font>
</pre>
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