Extracting confidence interval data from fitdist()

I'm using fitdist() to fit a poisson distribution, which works great, but I'm having trouble locating the confidence interval within the created PoissonDistribution object. The confidence interval gets returned if you enter the distribution object in the command line, but as far as I can tell doesn't exist as a substructure within the distribution. I'm not sure how to extract the confidence interval if I don't know where it is stored. Thanks!

pd = fitdist(a','poisson');
pd = 
Poisson distribution
  lambda = 0.0166667   [0.000421963, 0.0928607]
pd.lambda
ans =
  0.0167

Answer 1

[Star Strider]

Use the paramci function:

pd_ci = paramci(pd)

[Russell Perkins]

Works great, thanks! Seems obvious now that I know what I'm looking for hehe.

[Star Strider]

As always, my pleasure!

[Chiadika Eleh]

this doesnt work for poisson distrubutions anymore?

[Star Strider]

@Chiadika Eleh —

It seems to work —

data = poissrnd(42, 100, 1);
pd = fitdist(data,'poisson')

pd = 
  PoissonDistribution

  Poisson distribution
    lambda = 41.79   [40.523, 43.057]

pd_ci = paramci(pd)

pd_ci = 2×1

40.5230 43.0570

.

[Chiadika Eleh]

not for makedist, it gives the error regarding Dot indexing is not supported for variables of this type.

[Star Strider]

Post whatever problem you are having as a new question.