R - corrplot correlation matrix division -

here make example 12x12 correlation matrix:

df <- data.frame(x1=rnorm(20),x2=rnorm(20),x3=rnorm(20),x4=rnorm(20),x5=rnorm(20),x6=rnorm(20),x7=rnorm(20),x8=rnorm(20),x9=rnorm(20),x10=rnorm(20),x11=rnorm(20),x12=rnorm(20)) cormatx <- cor(df) corrplot(cormatx, method="color") 

i wondering how 1 output divided in 4 separate 6x6 matrixes? here image of how output should divided. hope makes sense.

like this?

par(mfrow = c(2,2)) corrplot(cormatx[1:6,1:6], method="color")   corrplot(cormatx[1:6,7:12], method="color")   corrplot(cormatx[7:12,1:6], method="color")   corrplot(cormatx[7:12,7:12], method="color")