Is there an open thread about calculations in RStudio? If not, here is my very simple question. Consider:

vector_a <- (-5:5)

and

vector_b <- (0:10)

I have to calculate the difference/sum/product between values in vector_a and values in vector_b.

Sum <- sum(vector_a, vector_b) returns value 55.

But product and difference functions return strange results.

If I use the command:

Difference <- vector_a - vector_b

this returns values 1, 1, 1, 1,1,..

When I use the command:

Difference <- diff(vector_a, vector_b)

returns error!

Does anybody can explain what are the right commands for these basic calculations?, Thanks for your help.