Plot on all the place of the window

Let do a plot without any margin. The coordinates of the plot area are from 0 to 1 on both x and y axis. It can be changed with the xlim and ylim parameters.

par(mar=c(0, 0, 0, 0))
plot(x=c(0, 1), y=c(0, 1), axes=FALSE, 
        xaxt="n", yaxt="n", main="", 
        xlab = "", ylab = "", 
        xaxs="i", yaxs="i", type="n")

Here is an example on the use:

lines(x=c(0, 1), y=c(1, 0), col="red")
text(x = 0.5, y=0.5, pos=NULL, labels='The center')

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