RE: st: alphabet range

[Nick Cox <n.j.cox@durham.ac.uk>]

For more on c(alpha) and friends, see 

SJ-4-2  pr0013  . . . . . . . . . . . Stata tip 9: Following special sequences
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
        Q2/04   SJ 4(2):223                              (no commands)
        tip for using creturn to access special sequences stored
        as c-class values

Nick 
n.j.cox@durham.ac.uk 

Eric Booth

clear
inp  q17as q17af q18bf q18bs q22af q22as
1 2 3 4 5 6
9 9 8 8 7 7 
1 2 1 2 3 4
2 2 2 2 2 2
end


**change the forval loop to the number of questions you have**
local vlist `c(alpha)'
foreach var of local vlist {
	forval n = 1/22 {
	di "dsq`n'`var'
 cap	gen dsq`n'`var' = q`n'`var'f - q`n'`var's
}
	}

On Sep 28, 2010, at 7:27 AM, Bernie Hogan wrote:

> q17af
> 
> where 17 is the matrix, a is the row, and f is the first person to
> respond, s is the second.
> 
> I would like to be able to do calculations on the entire row. The best
> I could come up with was:
> 
> local vlist a b c d e f g h i
> 
> foreach var of local vlist {
> 	gen dsq17`var' = q17`var'f - q17`var's
> }
> 
> But that means every time I do a new matrix I have to figure out how
> many variables, and then type out their letter by hand.
> 
> What I would really like is to be able to say:
> 
> foreach var of q17? [f or s] {
> gen newvar = q17?f - q17?s
> }
> (or whatever is the closest to that)


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