Question

I’m new to using R and I am trying to create a matrix of correlations. I have three independent variables (x1,x2,x3) and one dependent varaible (y).

I’ve been trying to use cor to make a matrix of the correlations, but so far I have bene unable to find a formula for doing this.

Answer 1

x1=rnorm(20)
x2=rnorm(20)
x3=rnorm(20)
y=rnorm(20)
data=cbind(y,x1,x2,x3)
cor(data)