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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: STATA graph question: Combining Histograms |

Date |
Thu, 18 Aug 2011 09:52:13 +0100 |

Christoph's commands should have one comma, not two. But I don't think that is what is being sought here. Here is another guess. Assuming that the answers to different questions are in different variables, you want a combined histogram across variables, and -histogram- doesn't support that. Reach for a -reshape-, then. Given some fake data clear set obs 100 forval i = 1/10 { gen q`i' = ceil(5 * runiform()) } . ds q1 q2 q3 q4 q5 q6 q7 q8 q9 q10 Marlis presumably already has an identifier, but I need one . gen id = _n . reshape long q, i(id) (note: j = 1 2 3 4 5 6 7 8 9 10) Data wide -> long ----------------------------------------------------------------------------- Number of obs. 100 -> 1000 Number of variables 11 -> 3 j variable (10 values) -> _j xij variables: q1 q2 ... q10 -> q ----------------------------------------------------------------------------- . rename _j question . rename q answer . histogram question, by(answer) discrete xla(1/10) freq Nick On Wed, Aug 17, 2011 at 10:26 PM, Christoph Engel <engel@coll.mpg.de> wrote: > If all you want is 10 graphs in one line, the following would do > > hist response26, freq, by(group, cols(10)) > > maybe together with > > hist response26, freq, by(group, cols(10)) xsize(10) ysize(2) > > If you also want to change the order, you need memory graphs. You could do > the following > > forvalues i = 1/10 { > hist response26 if group == `i', freq title("group `i'") name(group`i', > replace) > } > > and could then arrange them at will, using > > graph combine group2 group4 group6 > > Am 17.08.2011 22:15, schrieb Marlis Gonzalez Fernandez: >> >> Nick- >> >> Excuse my naiveté... have not figured out all the rules yet. >> >> Yes I did: >> >> . histogram response26, freq >> >> and repeated for 10 different responses thus generating 10 different >> histograms that I would like to combine (basically as they are) side by side >> so people can visually compare the frequencies between questions. Not >> worried about labeling at this point. >> >> Used: >> >> . graph combine graph1 graph2 graph3 >> >> But that is not what I am looking for. >> Nick Cox >> >> We can let -rep78- of the auto data serve as a Likert scale. (The term >> Likert honours Rensis Likert.) >> >> Without code examples of what you tried what you want remains a bit >> vague. Do you want axis scales? labels on the bars? or what? >> >> Is this what you want? >> >> . sysuse auto >> (1978 Automobile Data) >> >> . histogram rep78, freq >> >> . tab rep78 >> >> Repair | >> Record 1978 | Freq. Percent Cum. >> ------------+----------------------------------- >> 1 | 2 2.90 2.90 >> 2 | 8 11.59 14.49 >> 3 | 30 43.48 57.97 >> 4 | 18 26.09 84.06 >> 5 | 11 15.94 100.00 >> ------------+----------------------------------- >> Total | 69 100.00 >> >> . histogram rep78, freq discrete barw(0.8) yaxis(1 2) yla(6.9 "10" >> 13.8 "20" 20.7 "30" 27.6 "40" , axis(2)) ytitle("Percent", axis(2)) >> >> Here I did it by mental arithmetic after noting that 69 is 100% and 6.9 is >> 10%. >> >> Nick >> >> On Wed, Aug 17, 2011 at 8:19 PM, Marlis Gonzalez Fernandez >> <mgonzal5@jhmi.edu> wrote: >> >>> I am trying to combine frequency histograms for several questions into >>> one graph. Each variable has the answers to questions in a likert scale >>> (always, frequently, infrequently, never, don't know). I want to plot the >>> frequency and percent for each question side by side. Have not found a good >>> way to do this. * * 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: Multivariate probit with sample selection***From:*"Knoller, Christian" <knoller@bwl.lmu.de>

**st: STATA graph question: Combining Histograms***From:*Marlis Gonzalez Fernandez <mgonzal5@jhmi.edu>

**Re: st: STATA graph question: Combining Histograms***From:*Nick Cox <njcoxstata@gmail.com>

**RE: st: STATA graph question: Combining Histograms***From:*Marlis Gonzalez Fernandez <mgonzal5@jhmi.edu>

**Re: st: STATA graph question: Combining Histograms***From:*Christoph Engel <engel@coll.mpg.de>

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