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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
st: RE: combining frequency tables |

Date |
Mon, 23 Feb 2009 16:01:48 -0000 |

As I've said before, there's no virtue in simple questions. We want _interesting_ questions! This seems to be a question about Excel to the extent that it raises another question: Can't you do that in Excel if that's a tool of choice? (No idea from me.) But there are also many Stata answers. -findit mdesc- reveals that it is a program by Rose Anne Medeiros, who once wrote a program called -njc-, for which I am not responsible. Here is a matrix version of her program, for which she is not responsible. *! mmdesc 1.0 NJC 23 February 2009 * mdesc 1.0 RAM 18 JULY 2008 * Returns a table with number missing, total, and missing/total program mmdesc, rclass byable(recall) version 8 syntax [varlist] [if] [in] tempvar touse mark `touse' `if' `in' local nvars : word count `varlist' tempname matrix matrix `matrix' = J(`nvars', 3, .) local i = 1 quietly foreach var of local varlist { count if missing(`var') & `touse' matrix `matrix'[`i', 1] = r(N) count if `touse' matrix `matrix'[`i', 2] = r(N) matrix `matrix'[`i', 3] = `matrix'[`i',1] / `matrix'[`i',2] local ++i } matrix rownames `matrix' = `varlist' matrix colnames `matrix' = Missing Total Missing/Total matrix list `matrix', noheader return matrix table = `matrix' end Once you run this, you can save its results by e.g. mat A = r(table) ... mat B = r(table) ... mat C = A + B Nick n.j.cox@durham.ac.uk Shehzad Ali Another (perhaps) simple question: is it possible to add different frequency tables together to form a combined single table in Excel? I have two group variables (say, var1: type of treatment; and var2: time point of observation) and 5 use variables. So an observation would be for treatment A at time point 1. I want to know the number of missing values for each use variable for each treatment group and each time point. Also for each use variable there are 'if' conditions, so I can't do the frequency count in one go. Here is what I am doing using a user written programme -mdesc- or -missing-: by treatment timpoint: mdesc use1 if (condition1 condition2) by treatment timpoint: mdesc use2 if (condition3 condition4) and so on. Now I want to combine all these counts for all timepoints and treatment groups to get a single table that I can export to Excel. Is there any way I could do that? * * 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/

**Follow-Ups**:**Re: st: RE: combining frequency tables***From:*Shehzad Ali <sia500@york.ac.uk>

**Re: st: RE: combining frequency tables***From:*Shehzad Ali <sia500@york.ac.uk>

**References**:**st: combining frequency tables***From:*Shehzad Ali <sia500@york.ac.uk>

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