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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to make local condition for graph command |

Date |
Sun, 9 Dec 2012 21:24:56 +0000 |

What do you think of as an -if- statement? I already gave an example using the -if- command if r(p25) < . local p25 = round(r(p25)) If you mean why can't you go, using the -if- qualifier, local macname "<string>" if <condition> then one answer is that the first kind of statement meets the need, while the usual role of -if- is to restrict a command to certain observations, but the local being defined is not defined observation by observation. Nick On Sun, Dec 9, 2012 at 8:25 PM, Caleb Southworth <caleb.southworth@gmail.com> wrote: > Thanks, Nick. That works. > > Why is it that locals cannot be subjected to conditions with an if > statement? Not that I really need to know, but it would be convenient. > Or is it that the local is already defined at the point at which I > attempt to conditionally fill it with some string? > > On Sat, Dec 8, 2012 at 6:13 PM, Nick Cox <njcoxstata@gmail.com> wrote: >> Alternatively, move your statement >> >> local p25 >> >> just inside the loop and after -stci- put >> >> if r(p25) < . local p25 = round(r(p25)) >> >> >> On Sat, Dec 8, 2012 at 11:50 PM, Caleb Southworth >> <caleb.southworth@gmail.com> wrote: >>> This code creates a table and Kaplan Meier graphs for five >>> event-history outcomes. >>> >>> My problem is that under some circumstances, the 25th percentile is >>> undefined, so my -local p25- is undefined. This causes graph to crash >>> because I cannot specify a line at a missing value. Could someone >>> propose a work-around that is the logical equivalent of >>> >>> local p25="" if missing(r(p25)) >>> >>> The crash occurs in the line "sts graph" when missing(r(p25)) >>> >>> begin code: >>> >>> set more off >>> log using ${docpath}stdesc.txt, text replace >>> log off >>> local mean >>> local p25 >>> assert event!=.&event<=5 >>> forval i=1/5 { >>> qui stset app_dt, fail(event==`i') id(Cin) origin(time td(1Jan2008)) noshow >>> qui log on >>> qui stdescribe >>> di "event= " `i' " subjects= " r(N_sub) " failure= " r(N_fail) " >>> mean= " r(f_mean) >>> qui log off >>> qui stci, rmean >>> local mean=round(r(rmean)) >>> qui stci, p(25) >>> local p25=round(r(p25)) >>> sts graph, xline(`p25' `mean') xlab(0(300)1500 `p25' `mean', >>> angle(45)) saving(${gphpath}km`i'.gph, replace) >>> } >>> log close >>> >>> Here's the actual crash: >>> >>> event= 4 subjects= 63399 failure= 696 mean= .01097809 >>> invalid label specifier, : . 1537: >>> r(198); * * 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/

**References**:**st: How to make local condition for graph command***From:*Caleb Southworth <caleb.southworth@gmail.com>

**Re: st: How to make local condition for graph command***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: How to make local condition for graph command***From:*Caleb Southworth <caleb.southworth@gmail.com>

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