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From |
Austin Nichols <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: -args- how to flag when missing or too many arguments |

Date |
Thu, 21 Mar 2013 17:54:01 -0400 |

John Antonakis <John.Antonakis@unil.ch>: You might also want to step through various conditions and then issue a more informative error message at the end, e.g. consider adapting this approach: cap prog drop john prog john, rclass version 12 loc err 0 args no_vars df N chi loc w: word count `no_vars' `df' `N' `chi' if `w'>4 { loc err 1 di in red "More than 4 arguments given" } foreach v in no_vars df N chi { cap confirm integer number `=``v''' if _rc!=0 { loc err 1 di in red "Arguments must be integers." } else if ``v''<0 { loc err 1 di in red "Arguments must be positive integers." } } if `err'==1 { di in red "Please enter data after the command" _c di in red " john as follows: vars df N chi" exit 198 } end On Thu, Mar 21, 2013 at 5:49 PM, daniel klein <klein.daniel.81@gmail.com> wrote: > 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). * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: -args- how to flag when missing or too many arguments***From:*John Antonakis <John.Antonakis@unil.ch>

**References**:**Re: st: -args- how to flag when missing or too many arguments***From:*daniel klein <klein.daniel.81@gmail.com>

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