Orthogonal Least Squares Algorithm for RBF Networks

The code implements the OLS algorithm for func approx.

The code implements the algorithm as given in Chen et. al 1991.It takes max tolerance from the user.It selects Ms significant regressors from the total M regressors.
Unfortunately, the error obtained after training the RBF network isn't as expected. Is there a mistake in my code???
Please feel free to modify this code and mail me your suggestions on anshuman0387[at]yahoo[dot]com.
Any help in this regard would be greatly appreciated