Question

I have a matrix with the following values: a <- c(4,6,7,78,3,2,5,6,7,8)

I would like to create a second matrix b which lists the changes in a‘s value at each step.

So the solution would be: b <- c(2,1,71,-75,-1,3,1,1,1)

Is there a function for this in R and if there isn’t what is the easiest way to proceed?

Answer 1

a <- c(4,6,7,78,3,2,5,6,7,8) #this is not a matrix in R btw
diff(a)
#[1]   2   1  71 -75  -1   3   1   1   1