R : customize the pairs function to plot two different datasets

Question

Here is my problem:

I have two methods that respectively output the variables X1,X2 and X3 and Y1,Y2 and Y3. I would like to visualise graphically the difference of correlation between (X1,X2 and X3) and (Y1,Y2 and Y3). For that I would like to create a "pairs plot" in which the upper part represents a pair plot between the (X_i) and the lower part a pair plot between the (Y_i).

I tried to use the function documentation to deal with this problem but do not managed to know how to do this. I will appreciate any hints.

Answer 1

Have you tried using par(mfrow=c(2,1)) ? It tells R to make place for two plots in one graphical device one above the other (2x1 matrix). Then simply plot both pairs graphs.