MATLAB: How to add to index in for loop

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I am converting Python to Matlab. Here is Python code.
  1. collocation points
xc=np.zeros((numPanels,1))
yc=np.zeros((numPanels,1))
for i in range(numPanels):
    xc[i]=(xp[i]+xp[i+1])/2
    yc[i]=(yp[i]+yp[i+1])/2
Here is my Matlab code…
% collection of points xc = zeros(numPanels, 1);
yc = zeros(numPanels, 1);
for k = numPanels
   xc(k) = (xp(k) + xp(k+1))/2
   yc(k) = (yp(k) + yp(k+1))/2
end
xp and yp are arrays. I am trying to add 1 to the second index of xp and yp, where it says xp(k+1) and yp(k+1). Would I need to make another for loop for the indexing that is being added to 1?

Best Answer

xc = zeros(numPanels, 1);
yc = zeros(numPanels, 1);
for k = 1:numPanels-1
      xc(k) = (xp(k) + xp(k+1))/2
      yc(k) = (yp(k) + yp(k+1))/2
  end
You are in MATLAB..you can avoid loops here.
xc = (xp(1:end-1)+xp(2:end))/2 ;
yc = (yp(1:end-1)+yp(2:end))/2 ;
But the problem is size of xc and yc will be one less then xp and yp.
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