CLEVALS

Classifier evaluation (feature size/learning curve), bootstrap possible

    E = CLEVALS(A,CLASSF,FEATSIZE,TRAINSIZES,NREPS,T)

Input
A	Training dataset
CLASSF	Classifier to evaluate
FEATSIZE	Vector of feature sizes  (default: 1:K, where K is the number of features in A)
TRAINSIZES	Vector of class sizes, used to generate subsets of A (default [2,3,5,7,10,15,20,30,50,70,100])
NREPS	Number of repetitions (default 1)
T	Tuning set, or 'bootstrap' (default [], i.e. use remaining  objects in A)

Output
E	Error structure (see PLOTE)

Description

Generates at random, for all feature sizes defined in FEATSIZES or all  class sizes defined in TRAINSIZES, training sets out of the dataset A and  uses these for training the untrained classifier CLASSF. CLASSF may also  be a cell array of untrained classifiers; in this case the routine will be  run for all of them. The resulting trained classifiers are tested on all  objects in A. This procedure is then repeated N times.

Training set generation is done "with replacement" and such that for each  run the larger training sets include the smaller ones and that for all  classifiers the same training sets are used.

If CLASSF is fully deterministic, this function uses the RAND random  generator and thereby reproduces if its seed is reset (see RAND).  If CLASSF uses RANDN, its seed may have to be set as well.

Example(s)

See also

mappings, datasets, clevalb, testc, plote,