Which suggests the OP should verify that the data in "...$Frequency" is the
data he expects to be there.
Rui Barradas wrote
> Hello,
>
> I can't reproduce your error:
>
> windfreq <-
> c(1351L, 2147L, 3317L, 4378L, 5527L, 6667L, 7865L, 8970L, 9987L,
> 10907L, 11905L, 12642L, 131000L, 14983L, 15847L, 16842L, 17757L,
> 18698L, 19632L, 20626L, 21599L, 22529L, 23325L, 24391L, 25356L,
> 26267L, 27230L, 28223L, 29190L, 30142L, 31124L, 32104L, 3397L,
> 3437L, 3562L, 3646L, 3742L, 3824L, 399L, 4013L, 419L, 425L, 432L
>
> library(MASS)
>
> fitdistr(windfreq, "weibull")
>
>
> Hope this helps,
>
> Rui Barradas
>
> Em 28-10-2013 12:07, kmmoon100 escreveu:
>> Hello everyone,
>>
>> This is Kangmin.
>>
>> I am trying to produce shape and scale of my wind data. My data is based
>> on
>> wind speed frequency with 1km/hr increment. data is described below.
>>
>> Windspeed (km/h) Frequency
>> 1 351
>> 2 147
>> 3 317
>> 4 378
>> 5 527
>> 6 667
>> 7 865
>> 8 970
>> 9 987
>> 10 907
>> 11 905
>> 12 642
>> 13 1000
>> 14 983
>> 15 847
>> 16 842
>> 17 757
>> 18 698
>> 19 632
>> 20 626
>> 21 599
>> 22 529
>> 23 325
>> 24 391
>> 25 356
>> 26 267
>> 27 230
>> 28 223
>> 29 190
>> 30 142
>> 31 124
>> 32 104
>> 33 97
>> 34 37
>> 35 62
>> 36 46
>> 37 42
>> 38 24
>> 39 9
>> 40 13
>> 41 9
>> 42 5
>> 43 2
>>
>> R codes to calculate shape and scale are described below:
>>
>> Pine.windfrequency.4weeks<-read.table("C:/Users/kmoon/Documents/Pine_frequency_4weeks.csv",header=TRUE,sep=",")
>> fitdistr(Pine.windfrequency.4weeks$Frequency, densfun="weibull")
>>
>> I have got an error message when I was using 'fitdistr' function
>>
>> "Error in fitdistr(Pine.windfrequency.4weeks$Frequency, densfun =
>> "weibull")
>> :
>> optimization failed"
>>
>> Please help me calculating shape and scale of weibull distribution.
>>
>> And please understand that I am not an user familiar with R program but I
>> am
>> really trying to make my analysis work on R!
>>
>> Thank you!!!
>>
>> Kangmin.
>>
>>
>>
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/Optimization-failed-in-fitdistr-Weibull-distribution-tp4679167.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>>
> R-help@
> 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@
> 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.
--
View this message in context:
http://r.789695.n4.nabble.com/Optimization-failed-in-fitdistr-Weibull-distribution-tp4679178p4679351.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.
