/usr/share/doc/gri/html/example8.gri is in gri-html-doc 2.12.23-9build2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | # Example 8 -- Plot T=T(x,rho) section of eubex data
`Initialize Parameters'
{
\FILE_DATA = "example8a.dat" # T vs rho
\FILE_LOCN = "example8b.dat" # section distances
set missing value -99.0
#
# Following values from ~/eubex/processing/to_rho_bins/do_rho_inter
\RHO_MIN = "28.1"
\RHO_MAX = "27.5"
\RHO_INC = "-0.002"
\NY = "301"
\xmin = "350"
\xmax = "0"
\xinc = "-100"
\ymin = "28.1"
\ymax = "27.8"
\yinc = "-0.1"
\zmin = "0"
\zmax = "2.5"
}
`Initialize Axes'
/*
Set up axes
*/
{
set x name "km"
set x size 10
set x axis \xmin \xmax \xinc
set y name "$\sigma_T$"
set y size 5
set y axis name horizontal
set y axis \ymin \ymax \yinc
set y format "%.1f"
}
`Initialize Files'
{
query \data "Data file? " ("\FILE_DATA")
query \locn "Station locn?" ("\FILE_LOCN")
}
`Read Data'
{
# Read x-locations
system awk '{print $2}' < \locn > TMP
system wc TMP | awk '{print $1}' > NUM
open NUM
read .gridx_number.
close
system rm NUM
open TMP
read grid x .gridx_number.
close
system rm TMP
# Create y-locations
set y grid \RHO_MIN \RHO_MAX \RHO_INC
#
# Read data
open \data
read grid data \NY .gridx_number.
close
}
`Plot Contours'
{
set graylevel .contour_graylevel.
set clip on
set line width 0.5
draw contour -3 3 0.25 unlabelled
#
# wide line at 0 degrees
set line width 2
draw contour 0 unlabelled
}
`Plot Image And Maybe Contours'
{
\imagefile = "image"
set image range \zmin \zmax
convert grid to image box \xmin \ymin \xmax \ymax
query \dohisto "Do histogram scaling? (yes|no)" ("yes")
\incs = "no"
if {"\dohisto" == "yes"}
set image grayscale using histogram
else
\zinc = "0.25"
query \incs "In linear scaling, band at an increment of \zinc?" ("yes")
if {"\incs" == "yes"}
set image grayscale black \zmin white \zmax increment \zinc
else
set image grayscale black \zmin white \zmax
end if
end if
write image rasterfile to \imagefile
show "wrote image rasterfile `\imagefile '"
draw image
draw image palette
query \do_contours "Do contours as well (yes|no)" ("yes")
if {"\do_contours" == "yes"}
Plot Contours
end if
draw title "Example 8 -- \data black=\zmin white=\zmax"
if {"\dohisto" == "yes"}
draw title "Histogram enhanced grayscales"
else
if {"\incs" == "yes"}
draw title "Grayscale banded at intervals of \zinc"
end if
end if
}
Initialize Parameters
Initialize Axes
Initialize Files
Read Data
query \doimage "Draw image (yes|no)" ("no")
if {"\doimage" == "yes"}
.contour_graylevel. = 1 # white contours
Plot Image And Maybe Contours
else
.contour_graylevel. = 0 # black contours
Plot Contours
draw title "Example 8"
end if
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