substract array elements based on other arrays

Hi,

I have three arrays.

The first one contain all numbrs that need to be studied, All = [1,2,3,4,5,6,7,8,9,10]

The other arrays contains the numbers that need to be retained, R1 = [8,9,10], R2 = [5]

I want the result to be (All - R1 - R2) which is equal to [1,2,3,4,6,7].

Your help is highly appreicated

Answer 1

[Torsten]

setdiff(All,union(R1,R2))

[Mo H]

Thank you