How to have static axis values when plotting in R?

Question

I am using the following code:

x <-sample(1:100, 10);
y <-sample(1:100, 10);
plot(x,y);

but I am trying to create a plot with static values on x, y axis. The problem is that sometimes x axis for example, is presented with a value range from 0 to 80 on the plot, while others from 20 to 100 depending to the random values inside x.

I would like both x, y, to have a value range from 0 to 100 in the plot in all cases, regardless of the values inside x and y matrices.

Is there a way to achieve this?

Thanks in advance!

Answer 1

Depending on what exactly you mean by "value range from 1 to 100", one of the following should do the trick.

In the first one, plot by default extends the axis limits by 4% at both ends

In the second one, xaxs="i" and yaxs="i" are used to suppress this behaviour. (See ?par for more details.)

plot(x,y, xlim=c(0,100), ylim=c(0,100))

plot(x,y, xlim=c(0,100), ylim=c(0,100), xaxs="i", yaxs="i")

Answer 2

There are two functions you can use, xlim() and ylim() within plot() which you can use to manually set your axes.