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st: too many values for -tabulate twoway, summarize-, but not -tabulate twoway-

From   László Sándor <>
Subject   st: too many values for -tabulate twoway, summarize-, but not -tabulate twoway-
Date   Wed, 4 Apr 2012 12:25:45 -0400


I am still fiddling around with -tab, sum()- (using Stata MP 12.1 for
mac). I encountered some curious behavior that I could not track down.

This works without an error:
tab x by [aw=w]

While this gives me r(134):
tab x by [aw=w], sum(y)

Why should there be a difference? Are these limits documented somewhere?

FWIW, at the end I paste how I generated data for my particular test run.



For reference, here is the help on this error:

[P]     error . . . . . . . . . . . . . . . . . . . . . . . .  Return code 134
        too many values;
        1) You attempted to encode a string variable that takes on
        more than 65,536 unique values.  2) You attempted to tabulate
        a variable or pair of variables that take on too many values.
        If you specified two variables, try interchanging them.
        3) You issued a graph command using the by option.  The
        by-variable takes on too many different values to construct
        a readable chart.

set obs 1000
set seed 19821009
g y = rnormal()
g y2 = rnormal()
g by = y2 > 0.5
g w = runiform()
g x = runiform()
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