doubt about Open Mx documentation

2 replies [Last post]
ferranc's picture
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Joined: 03/05/2010

I'm learning SEM with the OpenMx documentation. First of all thanks for this I would agree your effort and attention.

I'm a beginner in SEM and I'm not sure about this question. I see a possible bug in documentation http://openmx.psyc.virginia.edu/docs/OpenMx/latest/Regression_Path.html. The specification of a multiple regression and multivariate regression talk about the covariance between x and z in a y equation (resp. z equation). This relation is specified in scripts like:
# covariance of x and z
mxPath(
from="x",
to="y",
arrows=2,
free=TRUE,
values=0.5,
labels="covxz"
),

Is this correct or have to be:
# covariance of x and z
mxPath(
from="x",
to="z",
arrows=2,
free=TRUE,
values=0.5,
labels="covxz"
),
I see the same thing in the graph specification (with sigmaxy).

thanks in advance,
Ferran Carrascosa

tbates's picture
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Joined: 07/31/2009
correct: y should be z as you

correct: y should be z as you say

mspiegel's picture
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Joined: 07/31/2009
Checked in the correction in

Checked in the correction in 3 places on that example. This will be fixed in 0.4.2.