Do you have any zeros in your data?
fitdistr() will need start values (see the code),
but even with start values, optim() will have problems.
x <- rweibull(100, 2, 10)
fitdistr(x, "weibull") ## no problem
fitdistr(c(0,x), "weibull") ## your error message
fitdistr(c(0,x), "weibull",start=list(shape=2,scale=10))
## still an error message from optim()
-Peter Ehlers
vikrant wrote:
Hi,
I want to estimate parameters of weibull distribution. For this, I am using
fitdistr() function in MASS package.But when I give fitdistr(c,"weibull") I
get a Error as follows:-
Error in optim(x = c(4L, 41L, 20L, 6L, 12L, 6L, 7L, 13L, 2L, 8L, 22L,
:
non-finite value supplied by optim
Any help or suggestions are most welcomed
--
Peter Ehlers
University of Calgary
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