<>
Note that a -tempvar- would have represented waste here as all you want is a
single value: You are better off with a -local-.
Also note that the result observed by Cathy probably hinges on her -set
type- behaviour. Stata assumes a certain default -data type- for a new
variable in a -generate- statement which she can find by typing -query
other-. As soon as you ask -generate- for a more memory intensive storage
type, such as -double-, the result is correct. Note how the waste of a
-tempvar- vs. a -local- multiplies by the number of observations in your
dataset in this case...
Last but not least, -display- gives you the first observation of a variable
by default so no error message alerts you to the waste...
***
clear*
drawnorm x y, n(100) /*
*/ corr(1,0.71 \ 0.71, 1) /*
*/ cstorage(full)
corr
tempvar wcorr1 wcorr2 wcorr3
gen byte `wcorr1' =/*
*/ round(`r(rho)', .01)
gen float `wcorr2' =/*
*/ round(`r(rho)', .01)
gen double `wcorr3' =/*
*/ round(`r(rho)', .01)
display `wcorr1' " " /*
*/ `wcorr2' " " /*
*/ `wcorr3' " "
***
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Cathy L.
Antonakos
Gesendet: Dienstag, 23. Juni 2009 18:18
An: [email protected]
Betreff: st: rounding a tempvar
Dear Statalist,
I want to display a correlation on a graph, rounded to 2 decimal places. A
new, temporary variable, generated as follows, does not produce the rounded
correlation I expect (r = 0.71).
. corr wandurav wanrate
(obs=177)
| wandurav wanrate
-------------+------------------
wandurav | 1.0000
wanrate | 0.7085 1.0000
. display `r(rho)'
.70846375
. tempvar wcorr
. gen `wcorr' = round(`r(rho)', .01)
. display `wcorr'
.70999998
There must be a simple way to do this.
Thanks for your help.
Cathy
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