calculating the area inside boundary

 Hi, 
I am trying to find the number of pixels inside the boundary where I have the boundary points coordinates only.
actually I want to calculate the area inside the boundary. I need some help.

[David Barry]

Please remove the code formatting from your question and upload some example data/code.

[Image Analyst]

No, you didn't. Read this link

Answer 1

[Image Analyst]

Use polyarea:

area = polyarea(xCoordinates, yCoordinates);

Answer 2

[Image Analyst]

If you have a binary image of the perimeter/boundary, you can fill it and call bwarea() or sum()

binaryImage = imfill(boundaryImage, 'holes');
area1 = sum(binaryImage(:))
area2 = bwarea(binaryImage)