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From |
"Tunga Kantarci" <tungakantarci@hotmail.com> |

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

Subject |
Re: Re: st: catplot problem |

Date |
Wed, 7 May 2008 14:42:28 +0200 |

> Tunga thinks it a "deficiency" that my -catplot- program, downloadable from SSC, when faced with a subset of observations with categories 1 4 5 6 7 8 9 10 does not notice that elsewhere in the data there are categories 2 3, which he wants to show on a graph. He wants a "better developed" command which does notice that. 1 4 5 6 7 8 9 10 are not categories. They are the values a variable takes. There is another variable which takes three values. Hence, for each of the 1 4 5 6 7 8 9 10, there are three bars. > However, that is all quite unnecessary, as -histogram- (a command, not a function) should prove capable of doing what he wants, or at least I have seen no evidence to the contrary. -histogram- does support categorical variables, As far as I am aware of, histogram does not do what I want. That is why I have first tried 'graph bar'. But since 'graph bar' works with row data I turned to catplot which procudes frequencies of categories. Put differently, I want the histogram command with "over(variablename)" command of 'graph bar'. Now, to avoid a misunderstanding I will repeat what I was trying to do: Variable 1: takes values from 1 to 10. Variable 1 ---------------------------------------------------------------------- | Freq. Percent Valid Cum. -------------------------+-------------------------------------------- 1 helemaal niks | 19 0.95 4.53 4.53 2 | 6 0.30 1.43 5.97 3 | 11 0.55 2.63 8.59 4 | 29 1.45 6.92 15.51 5 | 53 2.64 12.65 28.16 6 | 85 4.24 20.29 48.45 7 | 107 5.34 25.54 73.99 8 | 73 3.64 17.42 91.41 9 | 18 0.90 4.30 95.70 10 ideaal | 18 0.90 4.30 100.00 ---------------------------------------------------------------------- Variable 2: takes three values Variable 2 ----------------------------------------------------------- | Freq. Percent Valid Cum. --------------+-------------------------------------------- Valid 1 | 627 31.29 34.17 34.17 2 | 600 29.94 32.70 66.87 3 | 608 30.34 33.13 100.00 Total | 1835 91.57 100.00 ----------------------------------------------------------- What i am seeking is a frequency graph of variable 1, but each of its values will have three bars. I have achived this with catplot. So up to here no problem. The problem: Now, I have variable 3, just like variable 1, which takes 10 values but for values 2 and 3 there are no observations. When I run catplot, 2 has three categories and 3 has three categories, etc up to 8. There are no bars for 9 and 10. This is the problem: the frequency that should stand for value '4' stands for '2' in the graph. The frequency that should stand for value '5' stands for '3' in the graph. Now, if we agree on this -I mean if I was able to make my problem clear - this is a deficiency of catplot for me: Catplot simply places the bars to the wrong places. Put differently: if catplot was able to eliminate values 2 and 3 in the graph (because there are no observations for them) I would have no problem. But instead, catplot displays values 2 and 3 on the horizontal axis, but the associated bars beling to values 4 and 5. Now, I call this deficieny, bug, etc. I don't know what you want to call it. I am not trying to undermine the capabilities of catplot here. It is a useful command. But if it displays something wrong, then it is a deficiency. (assuming that I could explain my problem clearly) * * 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**:**Re: Re: st: catplot problem***From:*Maarten buis <maartenbuis@yahoo.co.uk>

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