# # $Id: contours.dem,v 1.17 2013/06/27 19:37:13 sfeam Exp $ # set samples 20 set isosamples 21 set xlabel "X axis" set ylabel "Y axis" set zlabel "Z " offset 1, 0 set view 60, 30, 0.85, 1.1 set key at screen 1.0, 0.9 set style textbox opaque noborder margins 0.5, 0.5 set title "contour plot" set contour splot x*y |
set cntrparam levels 15 set title "more contours (15 levels)" replot |
set cntrparam levels incr -100,10,100 set title "contour by increments (every 10, starting at -100)" replot |
set cntrparam levels disc -75,-50,0 set title "discrete set of contours (at -75, -50, 0)" replot |
set cntrparam levels auto 10 set view 60, 30, 1.0, 1.1 set title "contours on base grid with labels" set contour base set cntrlabel font ",7" splot x**2-y**2 with lines, x**2-y**2 with labels boxed notitle |
set title "contours drawn on surface" set contour surface splot x**2-y**2 with lines notitle, x**2-y**2 with lines nosurf lw 3 |
set title "contours on both base and surface" set contour both set hidden3d splot x**2-y**2 with lines, x**2-y**2 with labels boxed notitle unset hidden3d |
set contour base set title "2 surfaces" set key opaque splot x**2*y**3, x**3*y**2 |
set title "some more interesting contours" unset key splot x*y / (x**2 + y**2 + 0.1) |
set zrange [-1.0:1.0] splot [x=-3:3] [y=-3:3] sin(x) * cos(y) |
set samples 6 set isosamples 6 set cntrparam levels 5 set title "low resolution (6x6)" replot |
set title "low resolution (6x6) using cubic splines" set cntrparam cubic replot |
set cntrparam bspline set title "low resolution (6x6) using bspline approx." replot |
set cntrparam order 8 set title "low resolution (6x6) raise bspline order." replot |
set samples 25 set isosamples 26 set key default at screen 1.0, 0.9 set title "contour of Sinc function" splot [-5:5.01] [-5:5.01] sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2) |
splot [-12:12.01] [-12:12.01] sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2) |
set cntrparam levels 10 set auto set zrange [-1.0:1.0] set style data lines set title "contour of data grid plotting" set parametric splot "glass.dat" |
set xrange [0:15] set yrange [0:15] set zrange [-1.2:1.2] unset parametric splot "glass.dat" using 1 |
set view map
unset key
unset surface
set title "2D contour projection of previous plot"
set cntrlabel start 2 font ",7"
splot "glass.dat" using 1 with lines, \
"glass.dat" using 1 with labels boxed
|
# # The Rosenbrock function [HH Rosenbrock (1960) The Computer Journal 3:175–184] # (1-x)**2 + 100 * (y - x**2)**2 # is a well-known difficult test case for general purpose minimizers. # set auto set surface unset contour set cntrparam levels 5 set cntrparam linear set samples 100 set logscale z set hidden3d set isosamples 60 set ticslevel 0. set view 20,340 #HBB: ,1,2 set xlabel "x" set ylabel "y" Rosenbrock(x,y) = (1-x)**2 + 100*(y - x**2)**2 set title "Rosenbrock Function" splot [-1.5:1.5] [-0.5:1.5] Rosenbrock(x,y) |
set contour unset surface unset ztics unset zlabel set border 15 replot |
# set title "All contours drawn in a single color" set cntrlabel onecolor set cntrparam bspline splot [-1.5:1.5] [-0.5:1.5] Rosenbrock(x,y) lc rgb "#007700" |
set title "Sometimes it helps to use multiplot" set view map set xr [-0.5:1.5] set yr [0:1.5] unset xlabel unset ylabel set tics scale 0.0 set lmargin at screen 0.1 set rmargin at screen 0.9 set bmargin at screen 0.1 set tmargin at screen 0.9 set multiplot set cntrparam levels discrete 0.1, 1.0, 10.0, 100.0 set isosamples 500,100 splot Rosenbrock(x,y) with lines lc rgb "#007700" set isosamples 50,50 set cntrlabel start 25 interval -1 font ",7" splot Rosenbrock(x,y) with labels boxed unset multiplot |
# # Clean up: # reset |