To create a correlation matrix for data frame in R, you can use cor() function.

The following method shows how you can do it with syntax.

Method: Use cor() Function


The following example shows how create correlation matrix in R using cor() function.

Using cor() Function

Let’s see how we can use cor() function to create correlation matrix:

# Create data frame
df <- data.frame(Value = c(108,120,135,95,98,105),Reading= c(110,97,91,89,80,85))

# Correlation matrix
matrix <- cor(df)

# Print correlation matrix


       Value  Reading
Value   1.000000 0.270553
Reading 0.270553 1.000000

As the output shows correlation matrix for Value and Reading column of data frame.