Wassup,
This one is my fourth post in the R graphical series, post
this I will give graphs some pause. We have seen how to plot simple graphs in
R, how to plot multiple graphs together and how to plot multiple graphs with
more control. Now, we are going get even more sci fi. We are going to see how
to superimpose one graph over the other. And this time again we gonna call our
old friend, yep you got it the par() function.
By now we know that par() has many super powers. In this
post I will reveal to you another one – “fig”
The syntax of fig argument is as follows –
fig=c(x1,x2,y1,y2)
Where x1 and x2 are start and end points on the x axis from
0 to 1. And y1 and y2 are the start and end points on the y axis from 0 to 1.
These dimensions will include the entire graph area including the labels. It
will get clear with the examples.
One more thing after the first plot with each plot we need
to put new argument as True in the par() function
Alright. * popping fingers *
>par(fig=c(0,0.8,0,0.8))
>plot(mtcars$wt,mtcars$wt)
>par(fig=c(0,0.8,0.62,1),new=T)
>hist(mtcars$wt)
>par(fig=c(0.6,1,0,1),new=T)
>boxplot(mtcars$mpg,axes=FALSE)
In the above code our first graph is a simple plot with
x1=0,x2=0.8,y1=0,y2=0.8 . Things get interesting with second plot. Here I have
come with the values of fig after trial and error and most of the times you
will be required to do the same as well. Also notice that I have used the new=T
argument.
If you increase the size of the y dimension for the second
plot by lowering down y1, you will notice that the graphs will start
overlapping.
For the final graph again I have come up with dimensions
after trial and error and kept new argument as T.
And massaging enter will give. Boom –
Plotting a simple graph in R
R - Basic graphical parameters
See you next time.
Till then
Stay Awesome
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