R: Recipes for Analysis, Visualization and Machine Learning

Basic loops in R

If we want to perform an action repeatedly in R, we can utilize the loop functionality.

How to do it…

The following lines of code multiply each element of x and y and store them as a vector z:

x = c(1:10)
y = c(1:10)
for(i in 1:10){
z[i] = x[i]*y[i]
}

How it works…

In the preceding code, a calculation is executed 10 times. R performs any calculation specified within {}. We are instructing R to multiply each element of x (using the x[i] notation) by each element in y and store the result in z.