drop if grain == "wheat"
value labels for string variables:
not allowed
what you want is better done by
gen Crop = "crop" if inlist(crop, "wheat", "barley")
replace Crop = "root" if inlist(crop, "potato", "cassava", "yams", "beet")
...
Nick
[email protected]
TEWODAJ MOGUES
> For the longest time I have been trying to find ways around certain
> commands that would involve string variables, but I can't
> believe that
> these commands really don't exist. Hence my question: For example,
> if "grain" is a string variable, how do I do an operation
> such as "drop
> if grain==wheat"? Similarly, how do I create value labels for string
> variables. For example, if I want the variable "grain" to have the
> value label "crop" when it takes on the value "wheat" and "barley"? I
> would be delighted if I didn't have to find laborious ways of data
> manipulation where dealing directly with the string variables
> would be much easier.
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