generate new variable out of conditions on others

[Lola Nait]

Hello,
Suppose I have a a csv file :

nameofschool. enrollees
school1 15
school 2 2
....

And I want to create variable
numberofschool that represent the number of school for which enrollees>10
how do I do it?

[Nick Cox]

That is a single number. So

count if enrolless > 10 & enrollees < .