Johnson curve fitting

Fits a Johnson curve to data based on AS99, returns parameter estimates and curve type.

Description

Implements Carnegie-Mellon STATLIB/Applied Statistics AS-99 for fitting Johnson curve pdfs and developed by:

Hill, I.D., R. Hill, and R.L. Holder, 1976. Algorithm AS 99: Fitting Johnson Curves by Moments, Applied Statistics, Vol. 25, No. 2, 180-189.

[gamma,delta,lambda,xi,jctype,fault_msg]=cmu_as99_johnson_pdf_off_line(x)

Input:
x vector of sample observations

Output:
Parameter names as in AS-99.
Johnson curve parameters:
AS-99 Hahn-Shapiro
gamma gamma
delta eta
xi epsilon
lambda lambda

Johnson curve type and error state: jctype, fault_msg

• MATLAB release: MATLAB 6.5 (R13)

[yanling tian]

The updated file can not work without 'cmu_as99_johnson_pdf.m' could you upload other files in time

[Howard Schoeberlein]

This doesn't work in MATLAB V2007a and 2007b. The problem seems to be in the dll file. I get the following error message:

??? Invalid MEX-file 'C:\My MATLAB Work\Johnson
Curves\cmu_as99_johnson_pdf.dll': The specified procedure could not be found.

.

Error in ==> johnson_fit at 42
[gamma,delta,lambda,xi,itype,ifault] = cmu_as99_johnson_pdf(xbar,sd,rb1,bb2);

Note that it seems to be complaining about a proceudre called ".", strange as that is.

[Benjamin]

For Howard Schoeberlein, I recently learned from Matlab that the reason for the error that you received is due to the fact that the dll was compiled with Compaq fortran, not now supported in current (2008b) matlab vesion. I just found it myself. I'd provide you the source file if you write.

[Oleg Nazarevych]

cmu_as99_johnson_pdf.dll': Не
найдена указанная процедура.

.

Error in ==> cmu_as99_johnson_pdf_off_line at 77
[gamma,delta,lambda,xi,itype,ifault] =
cmu_as99_johnson_pdf(xbar,sd,rb1,bb2);