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From |
Cameron Hooper <[email protected]> |

To |
[email protected] |

Subject |
Re: st: RE: Question about a loop |

Date |
Tue, 5 Jul 2005 17:57:30 -0400 |

Hi

I don't know what local x 1 is doing here, but it seems irrelevant anyway.

A typo. I meant to type: local i 1. This is to initiate `i' for the first iteration of the loop.

Thanks. I forgot to add that I do not know how many num* variables I need to loop over. They are created by an earlier <reshape> command. I should have mentioned this in my original post. Your second suggestion does not need to know the number of num* variables and is exactly what I was looking for.One way to do this is forval i = 1/10 { gen op`i' = sum(ret) if inlist(num`i',-1,0,1) }

Another way to do it is foreach v of var num* { local V : subinstr local v "num" "op" gen `V' = sum(ret) if inlist(`v',-1,0,1) }

That's the go. Thanks. Cameron

Nick [email protected] Cameron HooperSay I have 10 variables named: num1, num2, ..., num10. I want to loop over these variables and create 10 new ones named: op1, op2, ..., op10. The following works: local x 1 foreach var of varlist num* { gen op`i' = sum(ret) if inlist(num`i',-1,0,1) local i = `i' + 1 } I was originally thinking of accessing each of the num* variable's name, extracting the last digit and appending this to the stub 'op' and thus create a new variable. But I don't know to access a variables name. Can such a thing be done? Can anyone suggest a better way of executing this code?* * 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/

* * 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: RE: Question about a loop***From:*"Nick Cox" <[email protected]>

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