CURVATURE FLOW: Matlab implementation?

Hi everyone,

I am a complete newbie to Matlab, and have been studying the Curvature flow process for a little while. Now I am trying to implement that process via Matlab and I am completely stuck. Attached is an image of my problem.

http://i.imgur.com/cnyb1.png

My current thought process is to compute '|X_alpha|' and 'n' individually, and then use those two functions to compute x dot. Integrating the alpha parameter into the equation is also very confusing for me. I am lost as how I should actually do this/start in Matlab, and I would really appreciate any help. Thank you very much.