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st: creating new variables with local macro contents


From   "Nelson, Carl" <chnelson@illinois.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: creating new variables with local macro contents
Date   Tue, 15 Feb 2011 10:43:35 -0600

Hello,

I am working with a data set that has quantity variables named like capital and labor, and price variables named pcapital and plabor. I am trying to use foreach loops to create expenditures and their sums but my syntax is wrong. I'd appreciate suggestions to fix my syntax. The example follows:

. local inputs "livestock material labor capital land"
. foreach input of local inputs {
  2.         replace `input' = -`input'
  3. }
. local quantity "grain sheep other `inputs' "
. macro list _quantity
_quantity:      grain sheep other livestock material labor capital land
. gen profit = 0
. foreach y of quantity {
  2.         gen exp`y' = `y'* p`y'
  3.         replace profit = profit + exp`y'
  4. }

Carl Nelson
University of Illinois

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