[Gretl-users] trouble with matrix functions

[nadaud at centre-cired.fr]

Dear all listers

As I wrote yesterday, here is my script and part of my data (a sample of 
500 households).

The following script does system estimation by ITSUR on two variables 
home energy and motorfuel.

then I compute elasticities for each household. Initially i intended to 
do it with matrix commands only. But as I encountered the problem i 
resorted to saving the fitted values and using genr commands.

However, after these command the script computes those same elasticities 
but with matrix commands.

So let ei = income elasticity for equation i

I have eih = 1 + beta[i] / what[i,h]

essentially i generate the vector of ones vecun = ones(500,1) then 
compute  b = beta[i] * (1/what[i,h]) to finally add them :

ei = vecun + b

but here gretl do not want to add those two vectors.

you can see it by yourself executing the script.

Notes :

1) i am under 1.7.1 just installed yesterday. The problem persists

2) in system estimation, the matrix accessors are a bit different. There 
is an extra line & column in $vcv and $coeff but I do not remember what 
it is exactly althrough it seems to be related to ML ?

greetings and see ya !

sincerly

Franck


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