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Re: st: how to add 23 in each row of a variable
I see braod agreement on the solution. This thread is a tough reminder,
though, of the difficulties that can sometimes seem insurmountable for
beginners in Stata. Having had a distraught student walk into my office a
couple of days ago with the exact same problem, I think it is extremely
important to emphasize that Stata does not exactly "push" subscripting as a
solution to data management problems. I would have trouble recalling a
single instance where subscripting has proved necessary for me in Stata...
Martin Weiss
_______________________
----- Original Message -----
From: "Eva Poen" <[email protected]>
To: <[email protected]>
Sent: Monday, September 15, 2008 8:10 PM
Subject: Re: st: how to add 23 in each row of a variable
Fabian,
er, no need for a loop. May
replace number = number + 23
be what you want?
The code for your (unnecessary!) loop as a few mistakes which I am
going to correct anyway.
If you use -while-, you have to increment your counter macro inside the
loop:
local i 1
while `i' < 100 {
....
local ++i
}
Else you have an infinite loop, because the initial condition is
always true. -foreach- and -forvalues- are usually much better
choices, and run faster, I believe.
Your condition -while `i' < _N- leaves out the last observation. Next,
number[i] should read number[`i']. _However_, none of this is
necessary! Use -generate- and -replace-.
Eva
2008/9/15 Fabian Brenner <[email protected]>:
Hello,
how can I tell Stata to add 23 in each row of a variable in the dataset?
I do not know what I am doing wrong because it does not work like this:
local i=1
while `i'<_N {
2. replace number[i]= number[`i'] + 23
3. }
Thanks for your help.
Fabian
P.S. Thanks a lot to Neil for the help.
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