Steven Yen <sye...@gmail.com> [Sun, Oct 19, 2014 at 06:17:48AM CEST]:
> Hello
> Can someone help me with the following, specifically in judging
> whether a matrix exists.
exists(my.matrix)
> I have trouble with the first line below. In
> this case, matrix obj$hessian exists and is 74 x 74. I receive the
> error message:
>
> Warning message:
Looks like a warning message to me.
> In all(w$hessian) : coercing argument of type 'double' to logical
>
all expects a logical vector, instead it finds a double vector. Trying
to make sense of it, it converts the double vector to logical using
as.logical(). Looking up ?as.logical I fail, however, to see which
rules it uses to convert double to logical. Possibly 0 -> FALSE and
everything else -> TRUE.
--
Johannes Hüsing There is something fascinating about science.
One gets such wholesale returns of conjecture
mailto:johan...@huesing.name from such a trifling investment of fact.
http://derwisch.wikidot.com (Mark Twain, "Life on the Mississippi")
______________________________________________
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.
