I have tried to get the area of the blobs in the image but this errors appears

Attempted to access yC(3); index out of bounds because numel(yC)=2.

Error in Contour2Area (line 24) s=(xC(2)-xC(1))*(yC(3)-yC(2))-(xC(3)-xC(2))*(yC(2)-yC(1));

Error in test (line 34) [Area,Centroid]=Contour2Area(cf);

[Image Analyst]

We're going to need you to read this and give us more code than that. I don't even know what yC is. Is it a bounding box, a centroid, what????