Loop function

[Samantha Will]

Hello,

I want to generate following:
gen capm1 = rmrf if decile == 1
and this 10x times, basically until
gen capm10 = rmrf if decile == 10

Do I have to type this in 10x myself or can I use foreach? Is foreach possible with function gen, because the variablename has to change every time?

At the end I would also like to form 10 regressions looking like this, which is perhaps more possible with foreach? :
reg decile1 capm1 until reg decile10 capm10

[Roman Mostazir]

forval i=1/10 {
g capm`i'  =  rmrf if decile == `i'
}

//Regression:

forval i=1/10 {

reg decile`i'  capm`i'

}

[Nick Cox]

No loop command (not function) is needed here to generate new variables.

separate rmrf, by(decile) gen(capm)

In a previous thread I wondered whether you really need separate variables, but that is a different question.

Roman Mostazir's,second loop could equally be a loop over 10 if qualifiers. -- that is, using the technique in his first loop.