How to build a vector where every n of 0 is 1 with operator %%?

Question

The code here below

1:nrow(mtcars) %% 4

provides the sequence

1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 0

What should I do to get the path?

0 0 0 1 0 0 0 1 0 0 0 1

Answer 1

You could simply wrap it in parenthesis and add an +:

+(1:nrow(mtcars) %% 4 == 0)

The parentheses - (1:nrow(mtcars) %% 4 == 0) - creates a boolean TRUE/FALSE vector, the + converts those values to 0 or 1.

Output

[1] 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1