Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Problem with "ereturn post" command


From   Valerie Orozco <Valerie.Orozco@toulouse.inra.fr>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: Problem with "ereturn post" command
Date   Thu, 4 Feb 2010 19:10:36 +0100

Hello,

I have two matrix, b1 and V1, which respectively correspond to a coefficient
matrix and variance covariance matrix and want  to use the "ereturn post'
 command.
I also have matrix Sameb1 and SameV1 (obtained from matrix manipulation that
I don't show here). They are the same than matrix b1 and V1.
Trying to use "ereturn post" command with Sameb1 and SameV1, Stata tells me
 I have a problem (Warning:  variance matrix is nonsymmetric or highly
singular) whereas running the command "ereturn post" on b1 and V1 works well...
See the matrix below...
Does someone have an idea???


. mat list Sameb1

Sameb1[1,8]
         e1vs3       e1vs1      eh1vs1       e2vs3       e2vs2      eh2vs2       e2vs1       e1vs2
r1   .54089558  -.59759218  -.48351881   1.1227012  -1.0151528  -.12922622  -.10754833   .05669663

. mat list b1

b1[1,8]
         e1vs3       e1vs1      eh1vs1       e2vs3       e2vs2      eh2vs2       e2vs1       e1vs2
r1   .54089558  -.59759218  -.48351881   1.1227012  -1.0151528  -.12922622  -.10754833   .05669663

. mat list SameV1

symmetric SameV1[8,8]
             e1vs3       e1vs1      eh1vs1       e2vs3       e2vs2      eh2vs2       e2vs1       e1vs2
 e1vs3   .00126543
 e1vs1   .00399013   .01289885
eh1vs1   .00425701   .01374035   .01463815
 e2vs3   -.0003382  -.00106641  -.00113774   .00009039
 e2vs2   .00140461   .00451378   .00481001   -.0003754   .00158176
eh2vs2   .00113774   .00367227   .00391222  -.00030407   .00128553   .00104559
 e2vs1  -.00106641  -.00344737  -.00367227   .00028501  -.00120636  -.00098146   .00092135
 e1vs2  -.00525556  -.01688898  -.01799736   .00140461  -.00591839  -.00481001   .00451378   .02214454

. mat list V1

symmetric V1[8,8]
             e1vs3       e1vs1      eh1vs1       e2vs3       e2vs2      eh2vs2       e2vs1       e1vs2
 e1vs3   .00126543
 e1vs1   .00399013   .01289885
eh1vs1   .00425701   .01374035   .01463815
 e2vs3   -.0003382  -.00106641  -.00113774   .00009039
 e2vs2   .00140461   .00451378   .00481001   -.0003754   .00158176
eh2vs2   .00113774   .00367227   .00391222  -.00030407   .00128553   .00104559
 e2vs1  -.00106641  -.00344737  -.00367227   .00028501  -.00120636  -.00098146   .00092135
 e1vs2  -.00525556  -.01688898  -.01799736   .00140461  -.00591839  -.00481001   .00451378   .02214454

.
. eret post Sameb1 SameV1
Warning:  variance matrix is nonsymmetric or highly singular

. eret post b1     V1



-------------------------------
Valerie OROZCO
Toulouse School of Economics (INRA-GREMAQ)
21, alle de Brienne
F-31000 Toulouse, France

MA 101
+33 5 61 12 85 91
-------------------------------


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index