[R] threshold distribution

Abelian abelian1982 at gmail.com
Sat Apr 4 14:30:44 CEST 2009


Dear ALL
I have a list of data below
0.80010 0.72299 0.69893 0.99597 0.89200 0.69312 0.73613 1.13559
0.85009 0.85804 0.73324 1.04826 0.84002
1.76330 0.71980 0.89416 0.89450 0.98670 0.83571 0.73833 0.66549
0.93641 0.80418 0.95285 0.76876 0.82588
1.09394 1.00195 1.14976 0.80008 1.11947 1.09484 0.81494 0.68696
0.82364 0.84390 0.71402 0.80293 1.02873
all of them are ninty.
Nowaday, i try to find a distribution to fit those data.
Firstly, I normalize the data, i.e.. (x-mean(X))/(sd(X))
i utilize the SAS to fit my data. Then i obtain the result below
##-------------------------------------------------------------------------------------------------------------
                                             Parameters for Lognormal
Distribution

                                                 Parameter   Symbol
Estimate

                                                 Threshold   Theta
-1.51062
                                                 Scale
Zeta      0.237283
                                                 Shape       Sigma
0.593481
 
Mean
0.001321
                                                 Std
Dev                   0.982435
##-------------------------------------------------------------------------------------------------------------------
however, i confuse about the threshold parameter..
How to get it? Does it be able to be calculated by R?
Thanks a lot......




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