How can I delete columns when value is grater than 65 but lower than 20?

I have a vector of (1:n) and i would like to delete the columns whose value is greater than 65 and lesser than 20.

Any help ?

Thank you!

Answer 1

[KSSV]

Let v be vector

v(v>65) = [] ;
v(v<20) = [] ;

[Francisco Anaya]

it worked, thank you!