Variables in R:
- you do not need to declare variables or their type, just assign the value
x <- 10 y<-"dog"
- you can change type of variable by just reassigning of a new value of another type
- variable can be an array or matrix (arrray of arrays) – also no need to declare anythingvector: a <- c(1,2,3,4,5)
matrix: b <- matrix(data=c(1:20), nrow=4, ncol=5)
- complex values: 1+1i