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st: RE: Difference of values in the same column/variable
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: Difference of values in the same column/variable
Date
Tue, 15 Nov 2011 09:57:38 +0000
In your example
bysort time (group) : gen newvar = ewportnet - ewportnet[_n-1]
Nick
[email protected]
[email protected]
How can i create a new variable that is equal to the difference in ewportret
(see below table) between two groups in the same month?
For example: the first row of the newvar below would be equal to (.0375245-
.041679) and the second row would be equal to(.0397919- .0449738)
group time ewportret newvar
1 2007m4 .0375245
1 2007m5 .0397919
1 2007m6 -.0188678
0 2007m4 .041679
0 2007m5 .0449738
0 2007m6 -.0240277
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