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

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

Subject |
st: RE: replacing values in a variable with rowsums, aka "ereplace" |

Date |
Mon, 14 Jul 2008 13:05:14 +0100 |

An -ereplace- would let you use -egen- functions to -replace- variables. There is no -ereplace- in the public domain. I looked in my files and found that I wrote one in 1998, but I don't use it myself and I've decided that there is little gain. Other programmers might have similar stories. For your problem, just use two statements rather than one: egen rowtotal = rowtotal(d2-d40) replace x = rowtotal if y == 2 Note the == in the second statement. Martin Weiss has suggested that you look at -cond()-. That's a good function to know about, but you can't use -rowtotal()- within -cond()- as -rowtotal()- is an -egen- function. But it still might be useful for your problem. Nick n.j.cox@durham.ac.uk Ora John Reuter I am searching for something that would do the equivalent of an 'ereplace'. I have a set variables for which I generated a -rowtotal- given some condition, e.g. (egen x=rowtotal (d1-d40) if y=1), but then I need to replace some values in that same variable (x) with a different -rowtotal- given a different condition. I dont know how else to explain it except to say that if there were an 'ereplace' command the next command would look like this: "ereplace" x=rowtotal(d2-d40) if y=2 In other words, I need to replace values in x with different sums of variables. I need to do this for a great many conditions so typing out the list of variables to be added for each condition would be a minor pain. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: replacing values in a variable with rowsums, aka "ereplace"***From:*Ora John Reuter <oreuter@emory.edu>

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