franco salerno
2011-Aug-27 19:15 UTC
[R] Ordered probit model -marginal effects and relative importance of each predictor-
Hi, I have a problem with the ordered probit model -polr function (library MASS). My independent variables are countinuos. I am not able to understand two main points: a) how to calculate marginal effects b) how to calculate the relative importance of each independent variables If required i will attach my model output. Thanks Franco
David Winsemius
2011-Aug-28 00:59 UTC
[R] Ordered probit model -marginal effects and relative importance of each predictor-
On Aug 27, 2011, at 3:15 PM, franco salerno wrote:> Hi, I have a problem with the ordered probit model -polr function > (library MASS). My independent variables are countinuos. > I am not able to understand two main points: > > a) how to calculate marginal effects > b) how to calculate the relative importance of each independent > variables > > If required i will attach my model output.It is a great puzzle to me that people think that the output of a statistical program can be interpreted without a clear and complete description of the input. -- David Winsemius, MD West Hartford, CT
Mark Difford
2011-Aug-28 07:25 UTC
[R] Ordered probit model -marginal effects and relative importance of each predictor-
On Aug 27, 2011 franco salerno wrote:> ...problem with ordered probit model -polr function (library MASS). > a) how to calculate marginal effects > b) how to calculate the relative importance of each independent variablesHi Franco, Have a look at John Fox's effects package (for a), and the Anova() function in his car package (for b). Regards, Mark. ----- Mark Difford (Ph.D.) Research Associate Botany Department Nelson Mandela Metropolitan University Port Elizabeth, South Africa -- View this message in context: r.789695.n4.nabble.com/Ordered-probit-model-marginal-effects-and-relative-importance-of-each-predictor-tp3773504p3774060.html Sent from the R help mailing list archive at Nabble.com.
poliscigradstudent
2011-Oct-21 04:23 UTC
[R] Ordered probit model -marginal effects and relative importance of each predictor-
late to the game but maybe this will help: docs.google.com/viewer?a=v&q=cache:8PhCkZxP9zQJ:www.quantoid.net/Effects_package_4up.pdf+plot+effects+of+variables+in+R+nonlinear+arrows&hl=en&gl=us&pid=bl&srcid=ADGEEShUKOEcifzuWGxWvakh0yD4KtnLgBhLFvX5cCAkwewyQ75uznTw1OYybx6vrGuJflgMw6QYKGwuXQViNGZCh_lt8H4DAqKNPxI8y2hYTQJTyaMD4tZ0DKrYMNGtIY3B34qp-LBX&sig=AHIEtbTdt10fNCOPXtg5nPSs85NqPFlAvA -- View this message in context: r.789695.n4.nabble.com/Ordered-probit-model-marginal-effects-and-relative-importance-of-each-predictor-tp3773504p3924287.html Sent from the R help mailing list archive at Nabble.com.