Missing statistical function:chi2

[Ahmed Sappa]

I am trying to obtain values from the chi2 distribution manually by using functions such as:

chi2
chi2tail
invchi2tail

however I get this error:

. chi2(11, 0.05)
command chi2 is unrecognized
r(199);

I have searched the forums and tried the "help" function but cannot seem to find a fix - any ideas?

[Joseph Coveney]

You're limited to invoking only commands at the command line in Stata. That is, you're not permitted solely to call a function there. So, you would use a command that itself can take a function's return value. Something like the following:

display chi2(11, 0.05)

[Nick Cox]

https://www.stata-journal.com/articl...article=dm0058 makes this point among others. The distinction between command and function in Stata is hard and fast but easily learned. For example, help is a command, not a function.

[Ahmed Sappa]

Thank you both, very helpful and greatly appreciated.