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From |
Donald Spady <[email protected]> |

To |
Statalist Statalist <[email protected]> |

Subject |
Re: st: graphing median values against time |

Date |
Wed, 9 Apr 2014 07:25:35 -0600 |

Tim After digesting your and Nick’s advice I have used the lgraph command to good effect; however I have one problem. If I write: foreach name in “cumten” “cumswol” { igraph `name’ following if visspell !=. & recnum == 1, by(aborig) label(0 3 9 15, lab size(tiny)) stat(mean) title(“Mean `name’ (Median:nonFN:Navy; FN:Gold)”,size(small)) label(#10) also collapse((median) median = `name’) addplot(line median following if aborig == 0, lcolor(dknavy) clwidth(thick)|| line median following if aborig == 1) } everything works fine and I get pretty pictures. BUT if I write: foreach name in “cumten” “cumswol” { lgraph `name’ following if visspell !=. & recnum == 1, by(aborig) label(0 3 9 15, lab size(tiny)) stat(mean) title(“Mean `name’ (Median:nonFN:Navy; FN:Gold)”,size(small)) label(#10) also collapse((median) median = `name’) addplot(line median following if aborig == 0, lcolor(dknavy) clwidth(thick)|| line median following if aborig == 1, lcolor(black)) } The only change is the addition of lcolor(black) at the end of the command. I get the message: invalid ‘title' r(198) Why. And how do I fix it. Many thanks. Don On Mar 30, 2014, at 8:43 PM, Timothy Mak <[email protected]> wrote: > <> > Thanks Nick very much for helping to answer my question. > > To plot more than one summary statistics is a bit difficult, and you do have to use the -addplot- and the -alsocollapse- options. If you hadn't specified -by(aborig)-, then Nick's syntax would be almost right, except that you don't need the -if bvisittm1N- in the end, i.e. -addplot(line median bvisittm1N)- would do. However, because you have specified -by(aborig)-, you really need to do: > > addplot(line median bvisittm1N if aborig == 1 || line median bvisittm1N if aborig == 2) > > supposing your variable aborig has 2 levels (1,2). > > To understand the use of the -addplot- and the -alsocollapse- option a bit more, you may want to use the -nopreserve- option. This gives you the dataset that -lgraph- actually uses to plot your graph. Also, have a look at the macros `r(command)' and `r(options)'. This gives you the -twoway- syntax that lgraph uses on the collapsed data. Be sure to use command double quotes though when you display the macros, i.e.: > > di `"`r(command)'"' > di `"`r(options)'"' > > I hope that helps. > > Tim > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox > Sent: 31 March 2014 08:38 > To: [email protected] > Subject: Re: st: graphing median values against time > > You *must* specify a -twoway- subcommand, not -lgraph-, in the > -addplot()- call. This is documented in the help for -addplot option-. > > I doubt very much that giving the same variable names as in the main > call will do what you want. > > My second guess is that you need something more like > > alsocollapse((median) median=totend28) > addplot(line median bvisittm1N if bvisittm1N) > > Nick > [email protected] > > > On 31 March 2014 01:29, Donald Spady <[email protected]> wrote: >> Nick >> I had tried various combinations of that command and could not get it to work. >> >> here is my command >> .lgraph tottend28 bvisittm1N if bvisittm1N < 55, by(aborig) xlabel(0(3)54) stat(mean) alsocollapse((median)) addplot(lgraph tottend28 bvisittm1N if bvisittm1N <55, by(aborig)) >> >> It doesn't work. I get the error >> lgraph is not a twoway plot type >> r(198); >> >> Don >> On Mar 30, 2014, at 5:14 PM, Nick Cox <[email protected]> wrote: >> >>> Timothy explains how to do that in the help. >>> >>> addplot(plot) This allows additional twoway plots to be plotted. >>> See addplot_option. Note that >>> because lgraph collapses the data before plotting in twoway, >>> plots given in addplot(plot) >>> should also refer to the collapsed data. Specify in >>> alsocollapse(clist) any additional data >>> that need to be collapsed. >>> >>> So, if you want median as well as mean you must specify >>> >>> alsocollapse(median) addplot(<whatever>) >>> >>> Note that nothing obliges you to use another -line- call. >>> >>> I haven't use -lgraph-, just looked at its help, but Timothy provides >>> lots of functionality. >>> Nick >>> [email protected] >>> >>> >>> On 30 March 2014 23:51, Donald Spady <[email protected]> wrote: >>>> Timothy >>>> I am using your -lgraph- command and wonder if it is possible to have TWO stats created (e.g. mean and median) for the same variable(s) at the same time. I want to plot both mean and median and cannot create an overlay to do so. >>>> >>>> Many thanks >>>> Don >>>> On Mar 28, 2014, at 1:29 AM, Timothy Mak <[email protected]> wrote: >>>> >>>>> The command -lgraph- that I wrote is for exactly this kind of problem if you don't want to create all the variables before plotting a graph. >>>>> You can see it by typing: >>>>> ssc des lgraph >>>>> >>>>> Tim >>>>> >>>>> -----Original Message----- >>>>> From: [email protected] [mailto:[email protected]] On Behalf Of Donald Spady >>>>> Sent: 28 March 2014 08:59 >>>>> To: Statalist Statalist >>>>> Subject: Re: st: graphing median values against time >>>>> >>>>> Nick >>>>> It works. Just as I needed. Many thanks. >>>>> John: That suggestion didn't work the way I wanted it to, but thanks for the idea. >>>>> >>>>> Don >>>>> On Mar 27, 2014, at 5:48 PM, Nick Cox <[email protected]> wrote: >>>>> >>>>>> Sure. If you use -egen-'s -median()- and -mean()- functions to get the >>>>>> variables you want, then it's any graph you want. >>>>>> >>>>>> As the median and mean values are repeated, don't plot them repeatedly. >>>>>> >>>>>> Here are some dopey examples. >>>>>> >>>>>> . webuse grunfeld >>>>>> >>>>>> . egen median = median(invest), by(year) >>>>>> >>>>>> . egen mean = mean(invest), by(year) >>>>>> >>>>>> . egen tag = tag(year) >>>>>> >>>>>> . line mean median year if tag >>>>>> >>>>>> For finer subdivisions, just use more variables as arguments to -by()-. >>>>>> >>>>>> Nick >>>>>> [email protected] >>>>>> >>>>>> >>>>>> On 27 March 2014 22:34, Donald Spady <[email protected]> wrote: >>>>>>> Dear all >>>>>>> I want to graph the median and mean values of a series of variables against a time variable (on the X axis) and with the option of stratifying the variables by another one (such as sex or disease state). I think I can do this by collapsing the data but is it possible to do this while retaining the data set in its 'original' state. I have searched the archives and the reference manuals but have not come up with anything that seems to be what I want. >>>>>>> In many ways what I would like is a box plot with JUST the median (or mean) being plotted: no box, no outliers. Is that possible. >>>>>>> >>>>>>> Thanks >>>>>>> Don >>>>>>> * >>>>>>> * 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/ >>>>>> >>>>>> * >>>>>> * 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/ >>>>>> >>>>> >>>>> >>>>> * >>>>> * 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/ >>>>> >>>>> * >>>>> * 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/ >>>>> >>>> >>>> >>>> * >>>> * 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/ >>> >>> * >>> * 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/ >>> >> >> >> * >> * 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/ > > * > * 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/ > > * > * 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/ > * * 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: graphing median values against time***From:*Nick Cox <[email protected]>

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