r pearson correlation code example

Example 1: correlation matrix in r

result = cor(x, method = "pearson", use = "complete.obs")
round(result,2)

Example 2: calculate correlation in r

cor(x, method = "pearson", use = "complete.obs")

Example 3: Pearson correlation

The usual definition of correlation. Technically,
Corr[X,Y] = Cov[X,Y]/(Std[X] * Std[Y]).