MATLAB: Area of multiple polygons

polygon

I have a cell which contains coordinates of different polygon,
eg: if 'A' is a cell which have coordinates of 26 polygon, so its size is 1×26.
Now i want to obtain the area of each individual polygon in the cell. How i can get that? I dont want the sum of area of all polygons, but want the area of individual polygons.

Best Answer

for i1=1:26
  data =mycoordinates{i1}%coordinate of i1th polygon
  data(end+1,:) =data(1,:)
  for i=1:max(size(data))-1
  s(i)=data(i,1) *data(i+1,2)-data(i,2)*data(i+1,1)
  end
    area(i1) = abs(sum(s)/2)
  end
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