Re: message "error" 'n' undefine near ...

[Andreas Weber]

Am 24.02.19 um 15:49 schrieb Robert Setif:
> Hello!
> My joined file "dfac.m" has a problem :
> " error: 'n' undefined near line 4 column 6
> error: called from
>      dfac at line 4 column 2 ".
> It is not very serious,because "dfac(10) " products 3840.
> However that becomes awkward, because this same error practically 
> arrives at all my programs. How to announce that “N” is a integer?
>    Thank you and best regards.

What is you problem here?
You want to be able to call "dfrac" without argument "dfrac()"
If this is the case you can declare a default value:

function r = dfac (n = 0)....


-- Andy