Estimate Cohen's d for effect size

Question

given two vectors:

x <- rnorm(10, 10, 1)
y <- rnorm(10, 5, 5)

How to calculate Cohen\'s d for effect size?

For example, I want to

Answer 1

Another option is to use the effsize package.

library(effsize) 
set.seed(45) x <- rnorm(10, 10, 1) 
y <- rnorm(10, 5, 5) 
cohen.d(x,y)
# Cohen's d
# d estimate: 0.5199662 (medium)
# 95 percent confidence interval:
#        inf        sup 
# -0.4353393  1.4752717