Greg Combs schrieb:
> Thanks to the 244 character limit in Stata, I'm running into some
> difficulty while working on very long strings.
>
> I'm wondering if there's ever been any effort to write some string
> wrapper functions for notes/characteristics, since they don't have
> this byte limitation.
...
> Maarten's information about pulling out the note as a local macro
> seems to be a good first step here ...
>
> `_dta[note1]'
>
> But I'd love to know if anyone's considered or started a library to
> have things like index, subinstr, regexr, regexm, word, itrim, substr
> operations on notes/characteristics or other lengthy data containers.
>
> Alternatively, if the kind folks at Stata want to give us a bigger
> character limit for strings in Version 11, I certainly wouldn't
> complain.
While waiting for version 11 you might want to look at the "extended
macro functions". These functions work with locals and globals and hence
also with chars after using
. local example `_dta[note1]'
Extended macro functions don't have the limitation of the "normal"
string functions. For example instead of
. local example = subinstr("this is a long string","long","short",.)
you might want to try out
. forv i = 1/100 {
. local x "`i' this is a long string `x'"
. }
. local example: subinstr local x "long" "very long", all
Other extended functions are:
word count string
word # of string
piece #_1 #_2 of [`]"string"['] [, nobreak ]
length { local | global } macname
subinstr { local | global } macname [`]"from"['] [`]"to"['] [, ll word
count({ local | global } macname) ]
Many regards
Uli
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