random number generator help

what is the implication of ">0.2" and "*2-1" in (rand(N)>0.2)*2-1 ?

Answer 1

[Azzi Abdelmalek]

Suppose N=[0.11 0.23 0.25 0.05 0.5]

N>=0.2

The result is

0 1 1 0 1

If you multiply the result by 2 you will get

0 2 2 0 2

and so on

[satish]

many thanks for prompt reply