Give an unknown number of parameters to feval

Hello,

I have a lot of signals on which I want to compute differents segmentation methods (in order to compare the differents methods). For each method, I created a function. Then, to apply each method to all of my signals I decided to store all the handles of the functions I want to apply and use feval in a loop :

(All of my signals have the same length so they are saved in the columns of a matrix named 'signalsMatrix')

numberOfChangePointsToFind = 4;
numberOfSignals = size(signalsMatrix,2);
segmentationFunctionsHandles = {@function1,@function2,@function3,...};
segmentationResults = struct('segmentationMethod',{},'changePointsIndexes',{});

for methodNumber = 1:numel(segmentationFunctionsHandles)
    segmentationResults(methodNumber).changePointsIndexes = zeros(numberOfChangePointsToFind,numberOfSignals);
    
    for signalNumber = 1:numberOfSignals
        y = signalsMatix(:,signalNumber);
        segmentationResults(methodNumber).changePointsIndexes(:,signalNumber) = feval(segmentationFunctionsHandles{methodNumber},y,numberOfChangePointsToFind);
    end
end

At first it worked fine because all my functions took the same number of parameters : 'y' and 'numberOfChangePointsToFind' .

But now I have new segmentation methods that have more parameters. For instance 'y' , 'numberOfChangePointsToFind' and 'kernelBandwidth' . So is there a way to give to feval parameters that have been previously saved in a variable ?

Like that for instance :

numberOfChangePointsToFind = 4;
numberOfSignals = size(signalsMatrix,2);
segmentationFunctionsHandles = {@function1,@function2,@function3,...};
segmentationParameters = {[],[],[3],...};
segmentationResults = struct('segmentationMethod',{},'changePointsIndexes',{});

for methodNumber = 1:numel(segmentationFunctionsHandles)
    segmentationResults(methodNumber).changePointsIndexes = zeros(numberOfChangePointsToFind,numberOfSignals);
    
    for signalNumber = 1:numberOfSignals
        y = signalsMatix(:,signalNumber);
        parameters = [[y,numberOfChangePointsToFind], segmentationParameters{signalNumber}];
        segmentationResults(methodNumber).changePointsIndexes(:,signalNumber) = feval(segmentationFunctionsHandles{methodNumber},parameters);
    end
end

Thank you

Answer 1

[Steve Eddins]

Put your parameters in a cell array and then use the syntax that expands a cell array into a comma-separated list:

out = feval(f,parameters{:});

[anna444]

Thanks