ParmHat not returning shape parameter
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Hello,
I'm new to MATLAB and statistics, but have been trying to estimate my parameters for a weibull distribution of a set of value. When I run the command parmHat=wblfit(x), it should technically return both scale and shape parameter, but its returning only the former. Why is it so?
My x data= [221447,277196,464274,565756,463453,564535,653655,564354,576124,567234,896453] fro example.
Regards
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Star Strider
2020-9-8
It returns both parameters for me (in R2020a, Update 5):
data= [221447,277196,464274,565756,463453,564535,653655,564354,576124,567234,896453];
parmHat = wblfit(data);
Shape = parmHat(1)
Scale = parmHat(2)
producing:
Shape =
588194.482822158
Scale =
3.35979418647355
.
6 个评论
Chaman Srivastava
2020-9-8
Star Strider
2020-9-8
My pleasure!
The wblfit function returns both, as my code demonstrates. (See the documentation for details.) They are both returned as elements of the same output vector, ‘parmHat’ in my code. They are not returned as separate outputs, as is true for normfit, for example.
Chaman Srivastava
2020-9-15
Star Strider
2020-9-15
The documentationi is a bit confusing in that regard:
- parmHat = wblfit(x) returns the estimates of Weibull distribution parameters (shape and scale), given the sample data in x.
- Estimate of the parameters a (scale) and b (shape) of the Weibull distribution, returned as a row vector.
Reading further in the documentation is always beneficial!
Chaman Srivastava
2020-9-15
Star Strider
2020-9-15
As always, my pleasure!
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