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| poissfit | Examples See Also |
Parameter estimates and confidence intervals for Poisson data.
Syntax
lambdahat = poissfit(X) [lambdahat,lambdaci] = poissfit(X) [lambdahat,lambdaci] = poissfit(X,alpha)
Description
poissfit(X) returns the maximum likelihood estimate (MLE) of the parameter of the Poisson distribution, 
, given the data X.
[lambdahat,lambdaci] = poissfit(X) also gives 95% confidence intervals in lamdaci.
[lambdahat,lambdaci] = poissfit(X,alpha) gives 100(1-alpha) percent confidence intervals. For example alpha = 0.001 yields 99.9% confidence intervals.
The sample average is the MLE of . 
Example
r = poissrnd(5,10,2); [l,lci] = poissfit(r) l = 7.4000 6.3000 lci = 5.8000 4.8000 9.1000 7.9000
See Also
betafit,binofit,expfit,gamfit,poissfit,unifit,weibfit