R is an open source program that can be used to do different calculations

In R is possible to add variables like:

x=5

and vectors like

vect1<-c(2,3,4)

is possible to do calculations with operator with simple variables and with vectors

x=3+4

vect2<- x * vect1

Correlations

With a data frame or a matrix it can be done a correlation with command

cor()

The command rcorr on libray Hmsic alows to have automatically the significance level of the correlation.