BasicR

b = c(2,4,5,6,7,78,89,10)
c = (30:100)
d = rnorm(100,0,1)
mean(d)
var(d)
sd(d)
mean(b)
summary(b)
x = rnorm(200, 2,4)
hist(x)
boxplot(x)

A= 1:9
mat1= matrix(A,3,3)
mat2 = matrix (A, 3, 3, byrow = TRUE)
mat2[,2]
mat2[2,]