How can I create a correlation matrix in R

Question

I have 92 sets of data that are all of the same type.

I'd want to create a correlation matrix for any two feasible pairings.

I need a 92x92 matrix, for example.

such that element (ci,cj) is a relationship between ci and cj.

How can I go about doing that?

Answer 1

An example,

 d <- data.frame(x1=rnorm(10),
                 x2=rnorm(10),
                 x3=rnorm(10))
cor(d) # get correlations (returns matrix)

You could use 'corrplot' package.

d <- data.frame(x1=rnorm(10),
                 x2=rnorm(10),
                 x3=rnorm(10))
M <- cor(d) # get correlations

library('corrplot') #package corrplot
corrplot(M, method = "circle") #plot matrix