# MATLAB: How to ensure two vectors are the same size when using findpeaks

findpeakslocal maximalocal minimaMATLABpeak to peakresize vector

I am using findpeaks to determine the local minima and maxima in a given input signal. I am then calculating the peak-to-peak difference between each of these minima/maxima pairs throughout the entire signal. Shown is my current code:
``signal = myvector;[pksmax,locsmax] = findpeaks(signal);[pksmin,locsmin] = findpeaks(-signal); realpksmin = -1*pksmin;for j = 1:size(realpksmin)    pk2pkmaxmin(j) = abs(pksmax(j) - realpksmin(j));end ``
Most of the time,
``size(pksmax) == size(pksmin)``
Sometimes these two vectors differ in size very slightly. If the above statement is false, then I have an error in my loop,
``Index exceeds the number of array elements (154).``
How can I ensure that
``size(pksmax) == size(pksmin)``
is always true upon using findpeaks(signal)?

``commonLength = min(length(pksmax) , length(pksmin));pksmax_new = pksmax(1:commonLength);pksmin_new = pksmin(1:commonLength);``