Dear Statalist,
I am curious why I cannot use a scalar in a forvalues loop. I was trying
to write a loop that will create a variable ind that equals 1 if the var1
contains the letter "r", 0 otherwise. I suspect it has something to do
with the frontslash in the second example, but I have not found a way to
get around it. Some sentences about the backslash in [U] 21.3.9 hint that
this might be the problem, though I don't know for sure.
The code below works fine to do what I want:
**********************************************************
local n=_N
gen ind=0
forvalues v=1/`n' {
replace ind=index(var1[`v'],"r") in `v'
}
replace ind=1 if (ind>1 & ind !=.)
***********************************************************
while this code does not work:
***********************************************
scalar n=_N
gen ind=0
forvalues v=1/n {
replace ind=index(var1[`v'],"r") in `v'
}
replace ind=1 if (ind>1 & ind !=.)
***********************************************
And this code works fine, though it's a different kind of loop.
***********************************
scalar n=_N
local i=1
while `i'<n {
di "`i'"
local i=`i'+1
}
***********************************
Thank you in advance for your help.
Dimitriy V. Masterov
_______________________________________________________________________________
Dimitriy V. Masterov
Work:
Center for Social Program Evaluation
1155 East 60th St. Room 038
Chicago, IL 60637
Work: (773)256-6005
Fax: (773)256-6313
Home:
1312 East 53rd St., Apt.309
Chicago, IL 60615
Mobile: (773)220-2760
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