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From |
Maarten Buis <maartenlbuis@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to use functions within variable names |

Date |
Wed, 17 Aug 2011 09:53:16 +0200 |

On Wed, Aug 17, 2011 at 3:14 AM, Sdfsdfsadfsf Sdfsdf wrote: > is it possible to use the result of a function or mathematical operation as a part of a variable name? > > Here is a simple example what I want to do > forvalue i=1(1)2 { > rename r`i'= r[`i'-1] // Instead of the operation in the squared brackets there should be the result eg.0 for 1-1 > } rename r`i' = r`=`i'-1' See: <http://www.maartenbuis.nl/example_faq/index.html#%60=%27> > or an more accurate example with variables > > forvalue i=1(1)100 { > replace b_`i'= a[c+`i'] > } > > c is a variable with integer values > The result of c+`i' determines the variable from which the value of b_`i'is taken from > > > eg `i'=3; c=7; > b_3 =a10 Here you need a very different strategy: *------------- begin example -------------- clear input str3 b1 str3 b2 c foo bar 8 bla bla 1 end forvalues i=1/2 { replace b`i' = "a" + string(c + `i') } list *-------------- end example --------------- (For more on examples I sent to the Statalist see: http://www.maartenbuis.nl/example_faq ) Hope this helps, Maarten Ps. Note that the Statalist FAQ states <http://www.stata.com/support/faqs/res/statalist.html#tojoin>: "It is long-standing practice on Statalist that most members, especially the most active members who supply a large fraction of the answers, post using their real names. This is one of the ways in which we show respect to others. So we discourage you from posting from behind fake names or identifiers. <snip> Please note that many members are less inclined to answer anonymous emails, sometimes to the point of ignoring them on principle. These choices are personal, but your chances of eliciting a good reply are greatly diminished if you write and conceal your identity. " -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/

**Follow-Ups**:**Re: st: How to use functions within variable names***From:*Maarten Buis <maartenlbuis@gmail.com>

**References**:**st: How to use functions within variable names***From:*Sdfsdfsadfsf Sdfsdf <jagfish101@yahoo.de>

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