Hi listers, greetings from Paris ! I am in big trouble with matrix functions under GRETL 1.7.0 under XP.
The problem is the following: I run system estimation (SUR) on microdata (10 305 households). Then i use the results (coefficients and fitted values) to compute elasticities for each household. however, gretl does not compute them. here is some code : matrix vecun = ones(10305,1) matrix erlog = vecun + (coeffaids[4,1]).*(1/what[,1]) matrix ercar = vecun + (coeffaids[4,2]).*(1/what[,2]) matrix erij = erlog~ercar matrix er=meanc(erij) er but gretl says : ? matrix erlog = vecun + (coeffaids[4,1]).*(1/what[,1]) Data type non conformant for the operation normally vecun is a column vector of ones (10305,1) ; coeffaids[4,1] is a scalar (so is promoted to matrix for this step) and 1/what[,1] is the inverse of the fitted shares for good one, again a column vector (10305,1). But gretl does not like it much ! This is puzzeling because, in another script, with *exactly the same data and the same code*, the computations run ok . Note that i checked the sizes of the other matrices : I just redo the computation on the main script and it runs ok ! any advice ? I am a bit lost ! cheers Franck
