R help - Oct 2013 - "Optimization fail" error from fitdistr (Weibull distribution)

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-fail-error-from-fitdistr-Weibull-distribution-tp4679169.html
Sent from the R help mailing list archive at Nabble.com.