#
# Explore the effect of image data pixels that are
# missing/NaN/Inf/garbage/...
# Test 2D and 3D versions of the generic and
# terminal-optimized image code.
# The four tests should all come out the same.
#
set title "Treatment of missing/undefined/NaN/Inf data"
unset key
set tic scale 0
set border 3 front
set cbrange [-2:7]
set cblabel "Score"
set cbtics 0,1,5
set xrange [-0.5:4.5]
set yrange [-0.5:5.5]
set datafile missing "?"
set ytics ("-Inf" 5, "Inf" 4, "NaN" 3, "Junk" 2, "?" 1, "0" 0)
unset xtics
# Define the test data as a named data block
$matrixdata << EOD
0 5 4 3 0
? 2 2 0 1
Junk 1 2 3 5
NaN 0 0 3 0
Inf 3 2 0 3
-Inf 0 1 2 3
EOD
set xlabel "First column contains various odd values"
set view map
plot $matrixdata matrix with image
pause -1 "Hit return to continue"
#
#
set title "Same thing in 'pixels' mode (2D)"
plot $matrixdata matrix with image pixels
pause -1 "Hit return to continue"
set title "Same thing passing data value through 'using 1:2:($3)'"
plot $matrixdata matrix using 1:2:($3) with image pixels
pause -1 "Hit return to continue"
set title "Same thing in 3D mode"
splot $matrixdata matrix with image
pause -1 "Hit return to continue"
set title "Same thing in 'pixels' mode (3D)"
splot $matrixdata matrix with image pixels
pause -1 "Hit return to continue"
set title "3D image with pixel value in 4th column"
splot $matrixdata matrix using 1:2:(0):3 with image
pause -1 "Hit return to continue"
reset
$DATA << EOD
0 0 0
0 1 -1
0 2 -4
0 3 -9
1 0 1
1 1 0
1 2 -3
1 3 -8
2 0 4
2 1 3
2 2 0
2 3 -5
3 0 9
3 1 8
3 2 NaN
3 3 9
EOD
unset xtics
unset ytics
unset key
set title "image from non-matrix data"
set label 1 at 3,2 "NaN\nshould appear as\nbackground" front center
plot $DATA with image
pause -1 "Hit return to continue"
set title "negative values mapped to log-scale colorbar"
set label 2 at 0,2.5 "Negative values become NaN\nwith a log-scale color mapping"
set cbrange [0.1:10]
set log cb
plot $DATA with image, $DATA using 1:2:(sprintf("%g",$3)) with labels tc rgb "green"
pause -1 "Hit return to continue"
reset
Generated by dwww version 1.15 on Mon Jun 24 13:27:10 CEST 2024.