# # 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