Calculating max and minimum values between zero crossing points

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Dan Banbury
Dan Banbury 2017-3-15
编辑： KSSV 2017-3-15
I have a 23036 x 6 x 39 matrix which contains all of my data, from this i have calculated the zero crossing points for this data but i'm stuck on how i can use this information to calculate the maximum and minimum values between these points. I have attached the Zero crossing matrix and the code used however i couldn't attached the original as the file size is exceeded.
number=0;
for i=2561:size(Wavedata,1)-5118
for j=1:size(Wavedata,2)
for k=1:size(Wavedata,3)
if (Wavedata(i,j,k)<0 && Wavedata(i+1,j,k)>0)
number=number+1;% save index of zero-crossing
A(number)=i;
B(number)=j;
C(number)=k;
end
end
end
end
%A' is the timestep, dividing by the sampling frequency 128Hz gives the
%time value.
z=[(A'/128) B' C'];

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