Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Difference of values in the same column/variable


From   [email protected]
To   [email protected]
Subject   st: Difference of values in the same column/variable
Date   Mon, 14 Nov 2011 21:21:17 -0500

Dear All,

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


Thank you

Gokhan


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index