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From |
Oliver Jones <ojones@wiwi.uni-bielefeld.de> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Automating graphs with data-dependent reference lines and saving with meaningful names. |

Date |
Thu, 26 May 2011 14:47:44 +0200 |

Am 26.05.2011 14:27, schrieb Maclennan, Graeme S.:

Dear Statlist, I have a tricky (at least to me) problem which I am currently unable to solve. I have P persons that answer Q Likert style questions on a scale of 1 to 9. What I need is plot of the distribution of responses to each question, but for each person P I want to indicate (using a line say) on the graph their response. This is to be fedback at a later stage, so I want to save each graph with a useful name that indicates the P and Q. So in "pseudo code": For each qestion Qj For each person Pi Histrogram Qj, discrete add line at value of Pi response to Qj, Save graph with name PiQj Problem 1 is getting the line to be different for each person P, in the archives I found that -addplot- with -pci- gives me what I want, but I cannot work out to automate the reading of the x-value. For example in the baby dataset below ******** Example Dataset************ clear set obs 20 set seed 1234 gen p = _n forvalues j = 1/5{ gen q`j' = 1 + int(9*uniform()) } hist q, discrete addplot(pci 0 5 20 5 , legend(off)) percent ***************End******************** P1 answered 5 to Q1, but is it possible to tell Stata to read the value automatically?

Hi, First: Your code above didn't work perfectly. One gets an error with the hist q, because q is an ambigous abbreviation. Second: Yes you can tell Stata look up the value of q1 for person p == 1. local answer_q1 = q1[1] hist q1, discrete addplot(pci 0 `answer_q1' 20 `answer_q1' , legend(off)) percent If you want you can create locals for all answers and all people by looping, i.e. count forval person = 1/`r(N)'{ forval i = 1/5 { local answer_p`person'_q`i' = q`i'[`person'] } } Hope this helps a little bit. Oliver

Problem 2 is getting trying to loop over each question for each person and save the graphs. In reality I wont have nice IDs for P, I have been trying to combine -foreach- over Q and levels of P but I know I am wrong. Plus I need to incorporate the solution to above Problem 1 into the loop. Ignoring that I have been trying variations of the below, but I am out of my depth. ******** Attempt********** levelsof p, local(pi) foreach q in q1-q4{ foreach i of local pi{ hist q, discrete addplot(pci 0 5 20 5 , legend(off)) percent saving(`q'`p') /// In here I need to somehow incorprate solution to Problem 1. } } **********End Attempt****** Any pointing in the right direction is appreciated. Regards, Graeme MacLennan The University of Aberdeen is a charity registered in Scotland, No SC013683. * * 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/

-- Universität Bielefeld Fakultät für Wirtschaftswissenschaften Lehrstuhl für Ökonometrie und Statistik - - Bielefeld University Faculty of Business Administration and Economics Chair of Econometrics and Statistics - - Raum / room: V9-110 Tel / phone: +49 (0)521 106 4871 --- * * 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: Use of results in variable name***From:*alec minnema <alecminnema@hotmail.com>

**st: Automating graphs with data-dependent reference lines and saving with meaningful names.***From:*"Maclennan, Graeme S." <g.maclennan@abdn.ac.uk>

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