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From |
"Nick Winter" <nwinter@policystudies.com> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: Re: How to suppress legend keys |

Date |
Thu, 10 Apr 2003 08:21:48 -0400 |

> -----Original Message----- > From: Friedrich Huebler [mailto:huebler@rocketmail.com] > Sent: Wednesday, April 09, 2003 11:19 PM > To: statalist@hsphsun2.harvard.edu > Subject: st: Re: How to suppress legend keys > > > --- Scott Merryman <smerryman@kc.rr.com> wrote: > > > Is it possible to instruct Stata to only show keys for data > > > that appears in the graph? > > > > This will only show the legend for only the second variable: > > > > twoway (scatter h r mp), legend(order(2 "Repair 1978")) > > Scott, > > Thank you for the suggestion but this does not quite help me. I am > creating time series graphs for several dozen countries with a > -foreach- loop and need a catchall command that does not require me > to know in advance which legend keys should appear in which graph. > > Here is an abbreviated excerpt from my command (I use ; as a > delimiter). The variable "country" contains the country name, "year" > is the year, and "var_a" and "var_b" are time series variables. The > macro "countries" contains the names of the countries for which I > need graphs. > > foreach x of local countries {; > scatter var_a year if country=="`x'", connect(l) || > scatter var_b year if country=="`x'", connect(l); > graph export "`x'.wmf"; > }; > > If var_a or var_b have no values, no lines will be plotted. However, > there is still a legend with entries for var_a and var_b. I want to > suppress the respective legend key if a time series does not appear > in the graph. How can this be done? Is there a kind of "legend if > var_a<." command? At least one of my time series always has data, so > there are no completely empty graphs. > > Friedrich Huebler Seems to me that you will need to build your own check of each variable, and then modify the graphing command accordingly. Something like: foreach x of local countries { quietly count if var_a<. & country=="`x'" if r(N)>0 { local leg1 1 } else { local leg1 } quietly count if var_b<. & country=="`x'" if r(N)>0 { local leg2 2 } else { local leg2 } scatter var_a year if country=="`x'", connect(l) || /// scatter var_b year if country=="`x'", connect(l) /// legend(order(`leg1' `leg2')) graph export "`x'.wmf" } Once you are checking this, you could also do it as follows, which generalizes to more variables: foreach x of local countries { local gcmd foreach v of varlist var_a var_b { quietly count if `v'<. & country=="`x'" if r(N)>0 { local gcmd `"`gcmd' scatter `v' year if country=="`x'", connect(l) ||"' } } `gcmd' graph export "`x'.wmf" } This just builds up the list of scatter commands in the local macro `gcmd', then executes the accumulated set. Nick Winter * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: Re: How to suppress legend keys***From:*Friedrich Huebler <huebler@rocketmail.com>

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