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

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

Subject |
st: RE: Help with loops |

Date |
Thu, 15 May 2008 22:03:33 +0100 |

Dots are not allowed in variable names. Period. So your code could read something like this: local varlist1 "var1 var2 var3 var4" forval i = 1/3 { foreach X of local varlist1 { gen `X'_y`i' = `X'_y replace `X'_y`i' = `X'_y + (`X'_y * `i'/100) } } It's not a good idea to loop over lists like 0.01 0.02 0.03, as sooner or later precision problems will bite. I always loop over integers, and do any arithmetic yielding fractions _inside_ the loop. Notice that I changed your outer loop to -forval-. That's a matter of style, not syntax. Nick n.j.cox@durham.ac.uk Rijo John I have the following that gives results the way I wanted. local varlist1 "var1 var2 var3 var4 " foreach i in 1 2 3{ foreach X of local varlist1{ gen `X'_y`i'=`X'_y replace `X'_y`i' = `X'_y+(`X'_y*`i') } } However, if I change values 1, 2, 3 to 0.01, 0.02 and 0.03 it gives me the error saying "var1_y0.01 invalid name". As I understand variables can not be named with dots in it? if so how do I get around? how can I modify it to generate variabes such as var1_y1=var1-(var1_y*0.01) and so on. * * 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/

**Follow-Ups**:**Re: st: RE: Help with loops***From:*"Rijo John" <rmjohn@gmail.com>

**References**:**st: Help with loops***From:*Rijo John <rmjohn@gmail.com>

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