Converting variable length vector into variable length input argument for function
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I'm trying to turn a function output vector of variable length into a variable number of arguments to be fed into another function, so each element of the output vector becomes one input argument for the next function below:
function [pd]=fit(xdata,fitname,pdfunc,start)
[params]=mle(xdata, 'pdf',pdfunc, 'start',start);
pd=makedist(fitname,deal(num2cell(params)));
end
xdata is some data array, fitname is something like 'Exponential' or 'GeneralizedPareto', pdfunc is an anonymous function such as pdfgp=@(x,k,sigma,theta) gppdf(x,k,sigma,theta), and start is the initial parameter values required by mle.
Right now this produces a "Not enough input arguments" error. I've also tried variants on using eval, deal and num2cell with no luck. Any help would be appreciated. Thanks!
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Accepted Answer
Walter Roberson
on 24 Jan 2018
This will not do any good. The output of mle is a numeric parameter estimate scalar or row vector. The parameters of makedist must be first the fitting name, and then name/value pairs.
You can use something like
temp = num2cell(params);
param_names = {'mu', 'sigma'};
pv_pairs = [param_names; temp];
pd = makedist(fitname, pv_pairs{:});
This counts on cell expansion going down columns first.
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