And indeed all your values are between 0 and 100 as promised (they just happen to all be less than .2).
You can see that the resulting values are percentages because they sum to 100 (1000*.1).
No single observation in the variable x is supplying more than 0.2% of the total of x. You can confirm this from the summarize command by observing that the maximum of x is about 1 and the sum of x is about 500.
In this instance, the -egen- command is equivalent to
summ x
gen pc=100*x/r(sum)
Hope this helps
David
[email protected]
-----Original Message-----
From: Levy Lee [mailto:[email protected]]
Sent: 06 September 2004 08:59
To: [email protected]
Subject: st: how PC works
Dear listers,
please test the following code:
clear
set obs 1000
gen x = uniform()
egen pc = pc(x)
sum
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
x | 1000 .5019275 .291899 .0007097 .9980542
pc | 1000 .1 .0581556 .0001414 .1988443
the above code generate a variable "pc", which is distributed between 0 and
.20, i do not know why? as the help file told me that the new variable
should be between 0 and 100.
Can you tell me the reason? is it a bug of stata?
thanks
Levy
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