Re: [R] model fine, predict gives an error
Yes, I did send an attachment - but I forgot that attachments might be removed, no? Here it is: http://rapidshare.com/files/452815636/drmData.RData Antje On 16 March 2011 12:19, Mike Marchywka wrote: > > > > > > > > >> Date: Wed, 16 Mar 2011 08:17:49 +0100 >> From: niederlein-rs...@yahoo.de >> To: r-help@r-project.org >> Subject: Re: [R] model fine, predict gives an error >> >> Anybody who can help me with this issue? > > did you post your data? I was curious so I thought I may look > but you need to post data so people can determine if they > can produce and fix your problem. Any complaints > about bad/ singular matricies are likely to depend on data > being bad in some way. > > > > >> >> >> >> >> On 15 March 2011 14:15, Antje Niederlein wrote: >> > Hi there, >> > >> > I try to model some dose response curves (drc-package). In most cases >> > it is fine but now I got some data which produces me the following >> > error: >> > >> > load("drmData.RData") >> > library(drc) >> > >> > drmObj <- drm(value ~ concentration, cmpd_respvar, data = drmData, fct = >> > LL.4()) >> > predict(drmObj) >> > >> >>> Error in chol.default(0.99 * object$fit$hessian + 0.01 * >> >>> diag(dim(object$fit$hessian)[1])) : >> > the leading minor of order 2 is not positive definite >> > Error in resultMat[, 2] <- estSE : replacement has length zero >> > >> > Can anybody explain to me why the calculation of the dose response >> > model works but the prediction fails? Anything I can do in this case? >> > >> > Antje >> > >> >> __ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] model fine, predict gives an error
Anybody who can help me with this issue? On 15 March 2011 14:15, Antje Niederlein wrote: > Hi there, > > I try to model some dose response curves (drc-package). In most cases > it is fine but now I got some data which produces me the following > error: > > load("drmData.RData") > library(drc) > > drmObj <- drm(value ~ concentration, cmpd_respvar, data = drmData, fct = > LL.4()) > predict(drmObj) > >>> Error in chol.default(0.99 * object$fit$hessian + 0.01 * >>> diag(dim(object$fit$hessian)[1])) : > the leading minor of order 2 is not positive definite > Error in resultMat[, 2] <- estSE : replacement has length zero > > Can anybody explain to me why the calculation of the dose response > model works but the prediction fails? Anything I can do in this case? > > Antje > __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] model fine, predict gives an error
Hi there, I try to model some dose response curves (drc-package). In most cases it is fine but now I got some data which produces me the following error: load("drmData.RData") library(drc) drmObj <- drm(value ~ concentration, cmpd_respvar, data = drmData, fct = LL.4()) predict(drmObj) >> Error in chol.default(0.99 * object$fit$hessian + 0.01 * >> diag(dim(object$fit$hessian)[1])) : the leading minor of order 2 is not positive definite Error in resultMat[, 2] <- estSE : replacement has length zero Can anybody explain to me why the calculation of the dose response model works but the prediction fails? Anything I can do in this case? Antje __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.