dear statalisters,
i am puzzled by the following behavior:
i use st_sview to access a stata variable and change it internally within mata. however, i am not able to "stretch" a string variable above its storage type, for example, "make" in auto.dta is stored as str18 but if i want to change it within mata to something longer than 18 chars, the new string gets truncated to 18 chars. the following code illustrates this behavior:
sysuse auto, clear
keep in 1/5
list make
d make
mata:
st_sview(x,.,"make")
x[.,.]=x*2
x
end
list make
replace make = "01234567890123456789" in 1
list make
as you can see, when i issue -replace- in stata, "make" is automatically promoted to str20.
how can i promote a sting var from within mata to a longer string?
thanks,
mike
ps. the same behavior happens with st_sstore:
sysuse auto, clear
keep in 1/5
list make
d make
mata:
st_sstore(2,"make","01234567890123456789")
end
list make
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