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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to insert the name of a variable into a matrix automatically |

Date |
Mon, 10 Sep 2012 13:36:39 +0100 |

Stata won't support the inclusion of textual information in a matrix. Rather, you mean you want automation of row names, which can be thought of as marginal labels. This is exactly equivalent to automating column names. matrix cancertypes = J(2,2,.) matrix colnames cancertypes = N median_age matrix rownames cancertypes = head lowgi local row = 1 qui foreach var of varlist head lowgi { count if `var'==1 matrix cancertypes[`row',2]=r(N) summarize AGE if `var'==1, detail matrix cancertypes[`row',2]=r(p50) local row = `row'+1 } matrix list cancertypes Nick On Sun, Sep 9, 2012 at 4:58 PM, yaacov lawrence <yaacovla@gmail.com> wrote: > For a medical epidemiological project looking at cancer incidence I > should like Stata to create a descriptive table of the variables as a > matrix that I will then export to Excel. There will be one row for > each variable. The various columns include number of observations, > median age, etc. I am using the "foreach" command. > > All works well. > The only problem is that I should like the first cell of each row to > contain the variable name, and I cannot see how to do this. I realize > that I could do this manually using "matrix rownames" but I would > rather do it automatically. > > example of the code below: > > thank you!! > > yaacov > ------------- > > matrix cancertypes = J(10,4,.) > matrix colnames cancertypes = "cancer_type" N median_age "%white" > local rownumber 1 > > foreach var of varlist head lowgi { > count if `var'==1 > matrix cancertypes[`rownumber',2]=r(N) > summarize AGE if `var'==1, detail > matrix cancertypes[`rownumber',3]=r(p50) > local rownumber=`rownumber'+1 > } > > matrix list cancertypes > * * 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: How to insert the name of a variable into a matrix automatically***From:*yaacov lawrence <yaacovla@gmail.com>

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