--- Stefan Gawrich wrote:
> Is there any univariate table command available that displays a
> bottom to top or reverse cumulative distribution? One example:
> I have data on the number of vaccine doses given (0..9) and want
> to know the percentage of cases having at least 4 or 3 or 2 doses.
I don't know of such a program, but it is easy enough to create it.
Below is such a program -reversecum-. It gives for each value the
percentage of observations that have that value or more (excluding
missing values), it allows for -fweights- and -if- and -in-
conditioning.
This program will be normally available on your computer like any
other Stata command, if you copy the line starting with
"*! version..." and ending with "end" (inclusive) into a file
and call it reversecum.ado and save it in your personal ado folder
(type in Stata -adopath- to find out where that is).
Alternatively, you can put these lines at the top of your do-file,
and this program will than be available while running that do-file,
like in the example below.
*-------------- begin example -----------------
program drop _all
*! version 1.0.0 MLB 20Jan2010
program reversecum
syntax varname [if] [in] [fweight]
marksample touse
tempvar _freq cum r_cum
if "`weight'" != "" {
local wgt "[`weight'`exp']"
}
preserve
contract `varlist' if `touse' `wgt', ///
freq(`_freq') cpercent(`cum') nomiss
qui gen double `r_cum' = 100 - `cum'[_n-1]
qui replace `r_cum' = 100 in 1
format `r_cum' %8.2f
label var `r_cum' "reverse Cum"
tabdisp `varlist', cell(`_freq' `r_cum')
restore
end
sysuse auto, clear
reversecum rep78
*-------------------- end example -----------------------
( For more on how to use examples I sent to statalist see:
http://www.maartenbuis.nl/stata/exampleFAQ.html )
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
*
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