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From |
Rebecca Pope <rebecca.a.pope@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: combining tables |

Date |
Tue, 30 Oct 2012 17:00:59 -0500 |

Several years ago, Nick Cox posted the text below in a post titled "Tabling: an agenda". As far as I can tell searching the list and the documentation, there hasn't been any progress on this agenda item as of Stata 12. Does anyone know of any new official/user-written commands that I've failed to discover? Absent that, I've attempted to produce a combined table of frequencies within the constraints as I understand them. Note, this is task-specific, not as general as what Nick proposed below. I could not figure out how to use the matrices from -tabulate, matcell() matrow()- to display the results nicely. Instead, I'm using a series of -table- commands, saving the results into a temporary data set (successive -append-s), and using -tabdisp- for the end result. I can get decent looking output of descriptive stats for all variables of interest in one table, but it is an inelegant solution. I've included an example using the auto data at the end of this e-mail so everyone can see my approach. Is there a better way to produce the resulting table? Regards, Rebecca -------------------- http://www.stata.com/statalist/archive/2003-10/msg00247.html <snip> Problem 2: combining tables =========================== As Phil has clearly highlighted, one common need is to put together what in effect sub-tables into combined tables. It could be argued that Stata should not interfere between you and your word and text processor; any way, at first sight it offers next to no tools for doing this. Available solutions: ... except that, in a sense, there is a bunch of commands for joining tables so long as they are (expressible as) Stata matrices. This line of attack is probably under-appreciated; at the same time, it falls short of what I guess people often need here. Required solutions: a whole mini-language for combining tables. In effect tables could be seen as objects and there would be a set of operations for combining them, with tunable control of output form: e.g. join along rows; join along columns; layer. Each combining would produce alignment, and be more than what anybody could do as a cut/copy/paste exercise. I guess that this would be a substantial project for Stata Corp. -graph combine- is a partial analogue. (But there's more, such as elementwise addition, subtraction, multiplication, division of tables...) <snip> ------------------ set more off sysuse auto.dta, clear tempfile stats /* Calculate table values */ /* Total & price */ qui summ price local total = `r(N)' preserve local lbl2: var label price clear set obs 2 gen charac = _n gen freq = `total' in 1 gen pct = 100 in 1 gen place = 1 in 1 gen type = "" in 1 replace freq = `r(mean)' in 2 replace pct = `r(sd)' in 2 replace place = 2 in 2 replace type = "cont" in 2 save "`stats'" restore /* rep78 */ preserve local lbl3: var label rep78 /* preserve original variable label */ recode rep78 (1/2=3) (3=4) (4=5) /* not recoding 5 because combining 4 with 5 */ mvencode rep78, mv(6) /* preserve missing, label as such later */ table rep78, contents(freq) replace rename rep78 charac rename table1 freq gen pct = freq/`total'*100 gen place = 3 gen type = "cat" append using "`stats'" save "`stats'", replace restore /* foreign */ preserve local lbl4: var label foreign recode foreign (0=7) (1=8) mvencode foreign, mv(9) table foreign, contents(freq) replace rename foreign charac rename table1 freq gen pct = freq/`total'*100 gen place = 4 gen type = "cat" append using "`stats'" /* Display combined results */ /* Variable headings for table */ label var freq "Frequency" label var charac "Characteristic" label var pct "Percent" /* Combine all value labels for variables in table */ label def charac 1 "N" 2 "Mean in Dollars (S.D.)" /// 3 "Poor/Fair" 4 "Average" 5 "Good/Excellent" 6 "Missing/Unknown" /// 7 "Domestic" 8 "Foriegn" 9 "Missing/Unknown" label val charac charac /* Give display names to value of place variable */ label def place 1 " " 2 "`lbl2'" 3 "`lbl3'" 4 "`lbl4'" label val place place label var place "Variable" /* Apply display formats */ tostring freq, format(%9.1gc) replace force tostring pct, format(%09.1fc) replace force replace pct = "(" + pct + ")" if type=="cont" /* because continuous vars use S.D., not %*/ /* Display table of statistics */ tabdisp charac, cellvar(freq pct) by(place) left concise restore * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: combining tables***From:*Nick Cox <njcoxstata@gmail.com>

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