File: integration_example.pcm

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clear
defaults
pi=acos(-1)
generate x 0,,2*pi 100
y = cos(x)^3+sin(x)^3
graph x y
!
set curvecolor red
graph\overlay x integral(x,y)
set curvecolor black
set
 %xtextlocation 53
 %ytextlocation 76
 textalign 1
 textinteractive 0
 
text '<C-2><H5%><Int><H3%>f(x)dx'
set
 %xtextlocation 45
 %ytextlocation 30
 textalign 9
 
text 'f(x) = cos(x)<^>3<_> + sin(x)<^>3<_>'
replot
zerolines\horizontal