Simple Addition using sapply in R

Question

I am trying to use sapply to add 0.84 until 1.7 is reached, so that I can avoid using a for loop.

What I already have tried:

my_vector2 <- sapply(-2.5:1.7, function(x) x + 0.84)

I am expecting to see -1.66, -0.82, 0.02, 0.86, 1.7 but the output is -1.66 -0.66 0.34 1.34 2.34 .

What am I missing?

Answer 1

seq() can do what you want:

> seq(-2.5,1.7,by = .84)[-1]
[1] -1.66 -0.82  0.02  0.86  1.70

The point of the [-1] is to throw away the first number, -2.5 . With round-off error, you might need to be careful with the final number as well. Type ?seq at the prompt for additional information.