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st: Generation of Variables with reference to values in the same column
From
Arnold Patrick Behrer <[email protected]>
To
[email protected]
Subject
st: Generation of Variables with reference to values in the same column
Date
Thu, 13 Sep 2012 23:40:00 -0600
Hello,
Is there an easy way to generate a variable that measures the change
in a given column? Specifically I want to create a variable that is
equal to:
log(CPIt) - log(CPIt-1)
I tried using the following code:
generate log(CPI[2])-log(CPI[1])
But that simply filled the column with the results of the function
using the values of CPI in rows 1 & 2. Short of doing that manually
for each row, is there a way to write something like:
generate log(CPI[X]) - log(CPI[X-1])
That just goes down the column and calculates for each new row? Or
should I just export into Excel?
Best,
Patrick
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