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# st: egen rowmean, loops and if

 From Thomas Speidel To Subject st: egen rowmean, loops and if Date Tue, 05 Apr 2011 14:01:38 -0700

```where 	occ_~1_1 = occ_met1_1
occ_~2_1 = occ_met2_1
occ_~3_1 = occ_met3_1

Of course, the data is much wider (and taller), with
occ_metj_i	j = 1 to <=3
i = 1 to <=8

```
I need to create summary measures for each i that takes the mean of the three j's. Two means are to be created: one that only evaluates values >1.5, and one that only evaluates values <=1.5:
```
+-----------------------------------------------------+
| id   occ_~1_1   occ_~2_1   occ_~3_1 mean1_1 mean2_1 |
|-----------------------------------------------------|
|  1          4          7          .    5.50       . |
|  2        1.5          .          .       .    1.50 |
|  3        2.3        3.3          .    2.80       . |
|  4        3.3        2.3        3.5    3.03       . |
|  5        1.5          .          .       .    1.50 |
|-----------------------------------------------------|
|  6        1.5          .          .       .    1.50 |
|  7        2.3          .          .    2.30       . |
|  8        1.5          .          .       .    1.50 |
|  9        1.5        2.3        3.3    2.80    1.50 |
| 10        1.5        2.3        3.3    2.80    1.50 |
+-----------------------------------------------------+

```
The main issue is that the two commands I thought of using, egen and cond, do not allow replace and egen, respectively. This loop is clearly wrong, but it was an attempt at producing what I need:
```foreach j of num 1/3	{
foreach i of num 1/8	{
```
egen mean1_`i' = rowmean(occ_met1_`i' occ_met2_`i' occ_met3_`i') if (occ_met`j'_`i'>1.5) egen mean2_`i' = rowmean(occ_met1_`i' occ_met2_`i' occ_met3_`i') if (occ_met`j'_`i'<=1.5)
```		}
}

Any suggestions (short of reshaping)?
Thanks.

--
Thomas Speidel
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```