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copied!<p>The trick is to use <code>ds</code> or <code>unab</code> to create the varlist expansion before asking Stata to loop over values in the <code>foreach</code> loop. </p> <p>Here's an example of each:</p> <pre><code> ******************! BEGIN EXAMPLE ** THIS FIRST SECTION SIMPLY CREATES SOME FAKE DATA & INDOOR VARS ** clear set obs 10000 local suffix `c(ALPHA)' token `"`suffix'"' while "`1'" != "" { g indoor`1'`2'`3' = 1+int((5-1+1)*runiform()) lab var indoor`1'`2'`3' "Indoor Values for `1'`2'`3'" mac shift 1 } g group = rbinomial(1,.5) lab var group "GROUP TYPE" ** NOW, YOU SHOULD HAVE A BUNCH OF FAKE INDOOR **VARS WITH ALPHA, NOT NUMERIC SUFFIXES desc indoor* </code></pre> <p>**USE <code>ds</code> TO CREATE YOUR VARLIST FOR THE <code>foreach</code> LOOP: </p> <pre><code> ds indoor* di "`r(varlist)'" local indoorvars `r(varlist)' local n 0 foreach i of local indoorvars { </code></pre> <p>**LET'S CLEAN UP YOUR TABLES A BIT WITH SOME HEADERS VIA <code>display</code></p> <pre><code> local ++n di in red "--------------------------------------------" di in red "Table `n': `:var l `i'' by `:var l group'" di in red "--------------------------------------------" </code></pre> <p>**YOUR <code>tab</code> TABLES</p> <pre><code> tab `i' group, col freq chi2 exact nolog nokey } ******************! END EXAMPLE </code></pre> <p>OR using <code>unab</code> instead:</p> <pre><code>******************! BEGIN EXAMPLE unab indoorvars: indoor* di "`indoorvars'" local n 0 foreach i of local indoorvars { local ++n di in red "--------------------------------------------" di in red "Table `n': `:var l `i'' by `:var l group'" di in red "--------------------------------------------" tab `i' group, col freq chi2 nokey //I turned off exact to speed things up } ******************! END EXAMPLE </code></pre> <p>The advantages of <code>ds</code> come into play if you want to select your indoor vars using a tricky selection rule, like selecting indoor vars based on information in the variable label or some other characteristic.</p>

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