set y name "Y-Axis"
set x name "X-Axis"
\xmin = "-6.28"
\xmax = "6.28"
\xinc = "6.28 / 50"
\function = "sin(x)"
set font to Times
set font size 14
set x axis -6.28 6.28 1
create columns from function
draw axes
set color red
draw curve
open cos.dat
read columns x y
close
set symbol size 0.3
set color green
draw symbol circ

set font size 0
draw axes
set font size 26
set font color rgb 0 0.5 0
set font to HelveticaBold
draw label "Sorry! " at 0.2 6
draw label "Gri can't draw 3D plot." at 0.2 5

set x name "X-axis"
set y name "Y-axis"
set x axis -6.28 6.28 1
set y axis -6.28 6.28 1
set font to Times
set font size 14
draw axes
set x grid -6.28 6.28 0.3
set y grid -6.28 6.28 0.3
open contour.dat
read columns x y z
close
convert columns to grid
set font to Helvetica
set font size 10
set color red
draw contour -1 1 0.1

# plot2d
set x size 4.5
set x margin 2
set y size 4.5
set y margin 8
set x axis -6.28 6.28 1
set y axis -1 1 0.2
\xmin = "-6.28"
\xmax = "6.28"
\xinc = "6.28 / 50"
\function = "sin(x)"
create columns from function
set font to Times
set font size 10
draw axes
set color red
draw curve
open cos.dat
read columns x y
close
set symbol size 0.3
set color green
draw symbol circ

# contour
set x margin 2
set y margin 2
set x axis -6.28 6.28 1
set y axis -6.28 6.28 1
set x grid -6.28 6.28 0.3
set y grid -6.28 6.28 0.3
set color black
draw axes
open contour.dat
read columns x y z
close
convert columns to grid
set font to Helvetica
set font size 5
set color red
draw contour -1 1 0.1

# plot3d
set x axis 0 10 5
set y axis 0 10 5
set x margin 7.5
set y margin 8
set font size 0
draw axes
set font size 14
set font color rgb 0 0.5 0
set font to HelveticaBold
draw label "Sorry! " at 0.2 6
draw label "Gri can't draw 3D plot." at 0.2 5