Back to demo index

gnuplot demo script: surface1.dem

autogenerated by webify.pl on Thu Nov 15 12:12:38 2018
gnuplot version gnuplot 5.2 patchlevel 5
#
# $Id: surface1.dem,v 1.14 2016/11/14 19:59:23 sfeam Exp $
#
set title "3D surface from a grid (matrix) of Z values"
set xrange [-0.5:4.5]
set yrange [-0.5:4.5]

set grid
set hidden3d
$grid << EOD
5 4 3 1 0
2 2 0 0 1
0 0 0 1 0
0 0 0 2 3
0 1 2 4 3
EOD
splot '$grid' matrix with lines notitle


Click here for minimal script to generate this plot



unset hidden3d
undefine $*

set samples 21
set isosample 11
set xlabel "X axis" offset -3,-2
set ylabel "Y axis" offset 3,-2
set zlabel "Z axis" offset -5
set title "3D surface from a function"
set label 1 "This is the surface boundary" at -10,-5,150 center
set arrow 1 from -10,-5,120 to -10,0,0 nohead
set arrow 2 from -10,-5,120 to 10,0,0 nohead
set arrow 3 from -10,-5,120 to 0,10,0 nohead
set arrow 4 from -10,-5,120 to 0,-10,0 nohead
set xrange [-10:10]
set yrange [-10:10]
splot x*y

Click here for minimal script to generate this plot



unset arrow
unset label
set grid
splot x**2+y**2, x**2-y**2

Click here for minimal script to generate this plot



splot x**2+y**2, x**2-y**2, x*y

Click here for minimal script to generate this plot



splot x**2+y**2, x**2-y**2, x*y, (x**3+y**3)/10

Click here for minimal script to generate this plot



set ticslevel 0.0
set title "3D gnuplot demo ( ticslevel = 0.0 )"
rep

Click here for minimal script to generate this plot



set ticslevel 2.0
set title "3D gnuplot demo ( ticslevel = 2.0 )"
rep

Click here for minimal script to generate this plot



set ticslevel 0.5
set title "3D gnuplot demo ( ticslevel = 0.5 )"
rep

Click here for minimal script to generate this plot



set title "3D gnuplot demo"
unset grid
splot x*y with points

Click here for minimal script to generate this plot



unset xtics
unset ytics
set xrange [-1:1]
set yrange [-1:1]
set title "Surfaces with no grid or tics"
splot x*y with lines, x**2*y**3 with dots, x**3*y*2 with points

Click here for minimal script to generate this plot



set xtics ("low" -3, "mid" 0, "high" 3)
set ytics -2,0.5,2
set xrange [-3:3]
set yrange [-3:3]
set log z
set title "Surfaces with z log scale"
splot x**2*y**2 + 2, x**2*y**4 + 2, x**4*y**2 + 2

Click here for minimal script to generate this plot



unset log z
set xtics autofreq
set ytics autofreq
set xrange [-1:1]
set yrange [-1:1]
set samples 51
set isosample 21
set dummy u,v
set title "3D gnuplot demo"
splot u*v / (u**2 + v**2 + 0.1)

Click here for minimal script to generate this plot



splot [x=-3:3] [y=-3:3] sin(x) * cos(y)

Click here for minimal script to generate this plot



set zrange [-1.0:1.0]
replot

Click here for minimal script to generate this plot



set title "Sinc function"
set zrange [-1:1]
set label 1 "This is equal to 1" at 0,3.2,1 left
set arrow 1 from 0,3,1 to 0,0,1
sinc(u,v) = sin(sqrt(u**2+v**2)) / sqrt(u**2+v**2)
splot [-5:5.01] [-5:5.01] sinc(u,v)

Click here for minimal script to generate this plot



set view 70,20,1
set zrange [-0.5:1.0]
set ztics -1,0.25,1
set label 1 "This is equal to 1" at -5,-2,1.5 centre
set arrow 1 from -5,-2.1,1.4 to 0,0,1
splot [-12:12.01] [-12:12.01] sinc(u,v)

Click here for minimal script to generate this plot



set title "fence plot constructed with separate parametric surfaces"
# A method suggested by Hans-Bernhard Broeker
# <broeker@physik.rwth-aachen.de>: display a separate parametric
# surface for each fence.
set zrange [-1:1]
unset label
unset arrow
set xrange [-5:5]; set yrange [-5:5]
set arrow from 5,-5,-1.2 to 5,5,-1.2 lt -1
set label 1 "increasing v" at 6,0,-1
set arrow from 5,6,-1 to 5,5,-1 lt -1
set label 2 "u=0" at 5,6.5,-1
set arrow from 5,6,sinc(5,5) to 5,5,sinc(5,5) lt -1
set label 3 "u=1" at 5,6.5,sinc(5,5)
set parametric
set hidden3d offset 0	# front/back coloring makes no sense for fenceplot #
set isosamples 2,33
xx=-5; dx=(4.99-(-4.99))/9
x0=xx; xx=xx+dx
x1=xx; xx=xx+dx
x2=xx; xx=xx+dx
x3=xx; xx=xx+dx
x4=xx; xx=xx+dx
x5=xx; xx=xx+dx
x6=xx; xx=xx+dx
x7=xx; xx=xx+dx
x8=xx; xx=xx+dx
x9=xx; xx=xx+dx
splot [u=0:1][v=-4.99:4.99] \
	x0, v, (u<0.5) ? -1 : sinc(x0,v) notitle, \
	x1, v, (u<0.5) ? -1 : sinc(x1,v) notitle, \
	x2, v, (u<0.5) ? -1 : sinc(x2,v) notitle, \
	x3, v, (u<0.5) ? -1 : sinc(x3,v) notitle, \
	x4, v, (u<0.5) ? -1 : sinc(x4,v) notitle, \
	x5, v, (u<0.5) ? -1 : sinc(x5,v) notitle, \
	x6, v, (u<0.5) ? -1 : sinc(x6,v) notitle, \
	x7, v, (u<0.5) ? -1 : sinc(x7,v) notitle, \
	x8, v, (u<0.5) ? -1 : sinc(x8,v) notitle, \
	x9, v, (u<0.5) ? -1 : sinc(x9,v) notitle

Click here for minimal script to generate this plot



set title "\"fence plot\" using single parametric surface with undefined points"
# Another method suggested by Hans-Bernhard Broeker
# <broeker@physik.rwth-aachen.de>: Use parametric variable u to control
# x, y, and z.  u=3*fencenumber+remainder, where the remainder selects
# one of three types of points:
# 	  remainder=0: x=xmin+fencenumber*dx, y=v, z=zbase
# 	  remainder=1: x=xmin+fencenumber*dx, y=v, z=f(x,y)
# 	  remainder=2: x=xmin+fencenumber*dx, y=v, z=1/0 (undefined)
set parametric
unset label
unset arrow
xmin=-4.99; xmax=5; n=10; dx=(xmax-xmin)/(n-1.)
set isosamples 3*n,33
zbase=-1
set arrow from 5,-5,-1.2 to 5,5,-1.2 lt -1
set label 1 "increasing v" at 6,0,-1
set arrow from -5,-5,-1.2 to 5,-5,-1.2 lt -1
set label 2 "increasing u" at 0,-5,-1.5
set arrow from 5,6,-1 to 5,5,-1 lt -1
set label 3 "floor(u)%3=0" at 5,6.5,-1
set arrow from 5,6,sinc(5,5) to 5,5,sinc(5,5) lt -1
set label 4 "floor(u)%3=1" at 5,6.5,sinc(5,5)
splot [u=.5:3*n-.5][v=-4.99:4.99] \
	 xmin+floor(u/3)*dx, v, ((floor(u)%3)==0) ? zbase : \
			 (((floor(u)%3)==1) ? sinc(xmin+u/3.*dx,v) : 1/0) lt 3 notitle

Click here for minimal script to generate this plot



unset hidden3d; unset parametric; set isosamples 20,20
set xrange [-1:1]; set yrange [-1:1]
set ztics autofreq
unset arrow
unset label
set log
set auto
set title "This has logarithmic scale"
splot [x=1:15] [y=1:15] x**2+y**2

Click here for minimal script to generate this plot



unset log
set xrange [0:15]
set yrange [0:15]
set auto
#set zrange [-0.6:0.7]
set ticslevel 0
set style data lines
set title "Data grid plotting"
set parametric
splot "glass.dat"

Click here for minimal script to generate this plot



splot "glass.dat" using 3:2:1

Click here for minimal script to generate this plot



set zrange [-1.2:1.2]
set ticslevel 0.5
unset parametric
set xlabel "line index within group"
set ylabel "group index"
splot "glass.dat" using 1, "glass.dat" using 2, "glass.dat" using 3

Click here for minimal script to generate this plot



set title "splot of part of a data file"
set xlabel "X axis" offset -3,-2
set ylabel "Y axis" offset 3,-2
set hidden3d
splot 'glass.dat' every 2::0::12 with lines

Click here for minimal script to generate this plot



set title "splot with \"set pm3d\" (implemented with some terminals)"
set pm3d
set hidden3d
splot 'glass.dat' every 2::0::12 with lines

Click here for minimal script to generate this plot



unset hidden3d
unset pm3d
set param
set title "Test of spherical coordinates"
set mapping spherical
splot "glass.dat"

Click here for minimal script to generate this plot




# mandelbrot demo
set title "Mandelbrot function"
unset parametric
set mapping cartesian
set view 60,30,1,1
set auto
set isosamples 60
set hidden3d
compl(a,b)=a*{1,0}+b*{0,1}
mand(z,a,n) = n<=0 || abs(z)>100 ? 1:mand(z*z+a,a,n-1)+1
splot [-2:1][-1.5:1.5] mand({0,0},compl(x,y),30)     

Click here for minimal script to generate this plot