Re: st: egen rowmean, loops and if

[Thomas Speidel <thomas@tmbx.com>]

I have a wide dataset:
  +-------------------------------------+
  | id   occ_~1_1   occ_~2_1   occ_~3_1 |
  |-------------------------------------|
  |  1          4          7          . |
  |  2        1.5          .          . |
  |  3        2.3        3.3          . |
  |  4        3.3        2.3        3.5 |
  |  5        1.5          .          . |
  |-------------------------------------|
  |  6        1.5          .          . |
  |  7        2.3          .          . |
  |  8        1.5          .          . |
  |  9        1.5        2.3        3.3 |
  | 10        1.5        2.3        3.3 |
  +-------------------------------------+

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)
		}
	}

Thanks.
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