To create a meaningful plot or if you want to save your plot as image you may want to define a fix aspect ratio. The plot function itself offers the possibility to define an own aspect ratio by setting the asp property. By default this property is ‚0‘ and therefore disabled.

The following example shows some plots with the same sinus function but different aspect ratios.

par(mfrow=c(2,3))
x <- seq(0, 20, 0.2)
y <- sin(x)

plot(x,y, type=’l‘, main=’ratio = 0′, asp=0)
plot(x,y, type=’l‘, main=’ratio = 1′, asp=1)
plot(x,y, type=’l‘, main=’ratio = 2′, asp=2)
plot(x,y, type=’l‘, main=’ratio = 4′, asp=4)
plot(x,y, type=’l‘, main=’ratio = 6′, asp=6)
plot(x,y, type=’l‘, main=’ratio = 8′, asp=8)