Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

# Re: st: Re: calculating proportions

 From Ekaterina Hertog To "statalist@hsphsun2.harvard.edu" Subject Re: st: Re: calculating proportions Date Fri, 02 Mar 2012 18:53:14 +0000

```Dear all,
```
Thank you very much all the advice, sorry if I appeared to abandon the thread, I had no internet for a week due to family illness. I have been working through the advice that Oliver and Nick offered and I am most grateful to both. I really like Nick's solution as it does not involve loops and hence works very quickly. I have played a bit with the code and this is the final version which produces the correct rankings
```
sysuse auto, clear
* foreign=22 domestic=52
contract mpg foreign
relrank mpg if foreign [fw=_freq] , ref(mpg if !foreign) gen(F)
```
la var F "proportion of domestic cars that have lower or equal to a given mileage value of a foreign car"
```gen negmpg = -mpg
relrank negmpg if foreign [fw=_freq] , ref(negmpg if !foreign) gen(G)
```
la var G "proportion of domestic cars that have higher or equal to a given mileage value of a foreign car"
```gen H = (G+F) - 1
```
la var H "proportion of domestic cars that have equal mileage to a given mileage value of a foreign car"
```replace G = G - H
replace F = F - H
l mpg F G H

Thank you very much again,
Ekaterina
*
*   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/
```