John,
I think I would address this with something like this
cap pr drop john
pr john
vers 12.1
args a b c d
if !inrange(`: word count `0'', 1, 4) {
di as err "Please enter data after " ///
"the command john as follows: vars df N chi"
e 198
}
numlist "`0'" ,int r(>0)
end
Best
Daniel
--
Hi:
I am writing a program and would like Stata to return an error if an
argument is missing or there are too many of them.
For example, if an argument is not an integer, the below will return an error:
program define john, rclass
version 12
args no_vars df N chi
if `no_vars'<0 | `df'<0 | `N'<0 | `chi'<0 {
di in red "You have to use integers."
exit 498
}
end
Now, how do I make Stata display:
di in red "Please enter data after the command john as follows: vars df N chi"
.....in cases where (a) there is a missing value (i.e., the user
missed putting 4 numbers) and (b) if the user provides too many
numbers (i.e., 5 instead of 4).
*
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