R return corrplot as object

Question

corrplot plots a correlation matrix, but it does not return a graphical object (grob)

I would like to plot several correlation matrices on a single page. For normal plots, I would use grid.arrange from the gridExtra package. However since corrplot only prints and does not return an object, I can't see how to do this.

Is there a workaround or a better alternative to corrplot ?

Answer 1

There's the old standby par(mfrow=c(x, y)) where x is the number of rows you wish to plot and y the numberof columns. It then posts across and then down as you call the plots.

par(mfrow = c(2, 2))
corrplot(cor(mat1))
corrplot(cor(mat2))
corrplot(cor(mat3))
corrplot(cor(mat4))

par(mfrow = c(1, 1)) #To clear layout

Will plot as

Mat1 | Mat2
-----------
Mat3 | Mat4