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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: trying to combine local macro and "format" command in a loop |

Date |
Thu, 5 May 2011 19:00:44 +0100 |

The program is called Stata, not STATA. r(mean) and r(sd) are numbers, not strings. For the string interpretation, you want say length("`r(mean)'") but the code segment local lm = length(r(mean)); local ls = length(r(sd)); local mn`v'_snh`i': display %`lm'.2f r(mean); local std`v'_snh`i': display %`ls'.2f r(sd); still looks unnecessarily contorted -- and not even likely to produce nice displays. Something like local show = trim("`: display %10.2f r(mean)'") shows a more useful approach. It sounds as if you want 2 decimal places. So use a format such as %10.2f that will always be big enough, then use -trim()- to get rid of unwanted spaces. (Your value of "10" may be different.) On Thu, May 5, 2011 at 5:57 PM, Woolton Lee <finished07@gmail.com> wrote: > Thank you to Maarten Buis for help in bringing some resolution to my > ongoing problem. I've modified my code so that it now attempts to > format the local macros created so that > > 1) they are rounded to two decimals > 2) the assigned format matches the length of the string stored in a macro > > These local macros are used in a postfile command to store the results > in a table. I'm using the following code to set the format of each > macro so that it matches the actual length of the numeric value. The > variables included vary in length for example age is like 52.34, while > total charges (tchg) can be something like 539202.12. I use the > function length to set a local macro for the mean and for the length > of the standard deviation of each variable and then attempt to set the > format. > > /* continuous variables - Lung */ > local vars2 age los tchg costpd rbchg rcchg scchg aneschg phrchg radchg mrict > nmchg clchg orchg msschg othchg; > forvalues x = 1/16 {; > local v: word `x' of `vars2'; > /********* insurance by safety net hospital */ > forvalues a = 1/4 {; > local i: word `a' of `ins'; > sum `v' if vhi_site == "Lung" & `i' == 1 & snh == 1 & link_lung == 1; > local lm = length(r(mean)); local ls = length(r(sd)); > local mn`v'_snh`i': display %`lm'.2f r(mean); > local std`v'_snh`i': display %`ls'.2f r(sd); > }; > > However, STATA gives me the following error. > > type mismatch > > Any ideas how to fix this problem so that in the loop each macro is > assigned its ROUNDED length? > From maarten buis <maartenlbuis@googlemail.com> > To statalist@hsphsun2.harvard.edu > On Thu, May 5, 2011 at 5:44 PM, Woolton Lee <finished07@gmail.com> wrote: >> I have a program which creates descriptive statistics using tab1, >> summarize and other functions, stores the macros then posts them using >> postfile and creates tables that can be cut and pasted easily into a >> word document. > <snip> >> This loop creates the variables mn and sd and rounds the result of the >> numbers I want to two decimal places then uses summarize to store >> these values into macros. I wonder if there is another more efficient >> way to do this? > > Yes, use the extended macro function -: display-, like in the example > below: > > *-------------- begin example ----------------------- > sysuse auto, clear > ds , has(type numeric) > local vars2 `r(varlist)' > > foreach v of local vars2 { > sum `v' > local m`v' : display %9.2f r(mean) > local sd`v' : display %9.2f r(sd) > } > > foreach v of local vars2 { > di as txt "mean of `v' = " as result `m`v'' > } > *-------------------- end example ---------------------- > > You can read more about extended macro functions by typing in > Stata -help extended_fcn- (I never remember the exact name, so > I always type -help macro- or -help local- and than click on the link > for extended macro functions). > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: trying to combine local macro and "format" command in a loop***From:*Woolton Lee <finished07@gmail.com>

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