Dividing cyclical data in array

Question

Marc Elmeua 2020-2-27

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评论： Marc Elmeua 2020-2-27

Hello,

I have acceleration data of diferent segments of a moving horse. I would like to split it so that I have a different array for each of the strides of the horse, so that I can later time normalize each stride and average them to obtain one averaged stride. I can identify each stride by locating the peaks of acceleration of the horse's foot.

Is there an elegant way to split the array in such way?

Thank you so much.

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Answer 1

Mohammad Sami 2020-2-27

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在 MATLAB Online 中打开

Assuming you can get the locations of the peak, you can create an id variable.

% acc = ... m x 1 array
%locationidxofpeak = somefuntion....
strideid = zeros(length(acc),1);
strideid(locationidxofpeak) = 1;
strideid = cumsum(strideid);
% now stride id would be like [0 0 0 0 0 1 1 1 1 1 2 2 2 2 2 ....]
for i = min(strideid):max(strideid)
    strideacc = acc(strideid == i);
    % your code.
end