Combination of foreach & forvalues

[Ghasem Yadegarfar]

Hi All,

I have a series of variables like x1, x2, x3,...x9 and y1,y2,y3, ..y9. How can I produce tabulation for x1 by y1, x2 by y2, x3 by y3,....x9 by y9 using stata foreach and forvalues codes together? Many thanks inadvance. Ghasem

[Nick Cox]

That needs just one loop, say

forval j = 1/9 { 
    tab x`j' y`j' 
}

There is a foreach solution too.

[Ghasem Yadegarfar]

Thank you so much Nick, may I ask what would be code for "foreach", please?

[Nick Cox]

That's set as an exercise.

The key here is that the variable elements in the loop are the suffixes 1(1)9.

The prefixes x y are constant.

You could loop over 1(1)9 using foreach, but it's not necessary or even an especially good idea.

[Ghasem Yadegarfar]

Many thanks again.