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

Re: st: AW: Calculating a (changing) accumulative sum

 From [email protected] To [email protected] Subject Re: st: AW: Calculating a (changing) accumulative sum Date Thu, 14 Jan 2010 18:00:21 +0100

```bysort subject (period) : gen accumcon=sum(con)

also worked! :-)

Thank you very much!

Martin Weiss schrieb:
```
<>
```
Try Nick`s http://www.stata-journal.com/sjpdf.html?articlenum=pr0004 for
further explanations...

*************
clear*
set obs 10
gen byte subject=_n

expand 10
bys subject: gen byte time=_n

gen con=int(runiform()*20)

bys subject (time): gen accumcon=sum(con)

l, sepby(subject) noo
*************

HTH
Martin

-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von
[email protected]
Gesendet: Donnerstag, 14. Januar 2010 17:49
An: [email protected]
Betreff: st: Calculating a (changing) accumulative sum

```
I have 20 "period"s (i.e., 20 rows) of data for each "subject" i. For each subject i, I would like stata to calculate the accumulative sum of the variable "con" in a new variable "accumcon" in the following way:
```
```
In period 1: accumcon = con[1]. In period 2: accumcon = con[1]+con[2] In period 3: accumcon = con[1]+con[2]+con[3] and so on, for each subject, from period 1 until period 20.
```
Thank you for your help.

```
```
--
Dr. Özgür Gürerk

Lehrstuhl für Mikroökonomie & Laboratorium für experimentelle Wirtschaftsforschung
(Microeconomics & Laboratory for Experimental Economics)

```
Universität Erfurt, Nordhäuser Str. 63, D-99089 Erfurt
```Tel: +49 361 7374561
Fax: +49 361 7374569
www.uni-erfurt.de/elab
--

*
*   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/
```

• References:

 © Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index