Use of arrayfun but with passing a fixed variable to function handle?

Hi!

I hope someone can help me with this.

The first column of my matrix contains start indices and the second stop indices that should be used to read out a segment from another vector.

From that segment some calculations are done returning a scalar, that should be stored in a third column.

This code shows the idea. WIth spikeTimes is the external vector providing the segments.

For sure it's not working, since spikeTimes is a kind of fixed variable whith another size.

matrix(:,1) = start_temp;
matrix(:,2) = stop_temp;
f = @computeS;
matrix(:,3) = arrayfun(f,start_temp,stop_temp, spikeTimes);


function thresh = computeS(a,b,spikeTimes)
thresh = max(diff(spikeTimes(a:b)));
end

And it was just an idea,I'm happy about any thoughts about a proper solution. Maybe the best is simply running a loop?

Thank you in advance, I appreciate any hints!

Eva

[Eva-Maria Weiss]

Meanwhile I found something in the provided answers here using argument binding:

https://de.mathworks.com/matlabcentral/answers/424230-arrayfun-with-multiple-inputs-and-a-different-size-output#answer_341671

Thanks to Guillaume for that solution!!!!!

I'm still open for other ideas and thoughts!

Answer 1

[James Tursa]

matrix(:,3) = arrayfun(@(a,b)max(diff(spikeTimes(a:b))),start_temp,stop_temp);