CumFreqA :   Fitting of composite probability distributions to a data set.
Totally free download of software

Summary:
The amplified CumFreq computer program (model), CumFreqA, originally designed to perform a
probability distribution fitting, has been given the possibility to fit composite (discontinuous, segmented) distributions to a data range. An article using composite probability distribtions has appeared in the International Journal of Mathematical Methods, see this copy.
Screenprint:

composite probability distributions

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Example of a composite distribution of rainfall data in a region in which the rainfall pattern changes according to the position of the "El Ninyo" ocean current, where the separation point is at X=230:

composite probability distribution


Example of a list of probabilty distributions ranked according to their goodness of fit:

composite probability distribution