On Wed, Aug 1, 2012 at 11:40 AM, matthewbk <matthew_...@hotmail.com> wrote:
> Hi
>
> I am using the nls function in R however it is causing the following error:
> REAL() can only be applied to a 'numeric', not a 'logical'
>
> Using traceback shows this occurs after the .Call(R_nls_iter, m, ctrl,
> trace) call. However I do not know how to debug this further to find out
> what is causing the error.
>
> The data I give the nls call definitely starts as numeric. The data.frame is
> generated by using the following:
>
> d = data.read('data.csv', header=FALSE)
> x = as.numberic(d[,1])
> y = as.numberic(d[,2])
> z = as.numberic(d[,3])
> ...Certainly no "b" ? > > dat = data.frame(x,y,z...) > > nls is started by calling: > mdl = nls(y ~ Model(x,y,z....,b1,b2,b3), data = dat) > > Thanks in advance for any help. > > Matthew > > This one's actually tricky since that's an error arising from the C code. I don't think there's an error in the C code, but let's do some work on debugging. To start with, can you make a small reproducible example following the advice given here: http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example To wit, we don't have your "dat" data (use dput! but please, only a small-ish subset) nor the function "Model" and the lines of code replaced by "..." worry me as well. Best, Michael > > > -- > View this message in context: > http://r.789695.n4.nabble.com/R-nls-iter-error-REAL-can-only-be-applied-to-a-numeric-not-a-logical-tp4638717.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
