Trying to format a matrix correctly

Hi,

I have an array of 211 xdata points.

The matrix I am trying to create is this

Where lambda is related to the xdata points

L = 1 - (xdata ./ 100); %Lambda
Lambda_inverse = L.^-1;

The idea is I am calling a function that will generate a number at each x data point, so really it should be 211 matrices and where matrix 1 is used for point 1, matrix 2 is used for point 2 and so on.

I tried to make a big matrix that would include all this information, and failed miserably!

dummy=zeros(length); %where length is the number of xdata points
F = [Root_L_inverse dummy dummy; dummy Root_L_inverse dummy; dummy dummy L];

What would be used in the function is the trace of the matrix at each xdata point

I1 = trace(F);

fun = @(W,xdata) -Area.*( (W(1).* exp( (W(2)) .* (I1 - 3)) ) .* (L.^2 .* Lambda_inverse) )

Where W(1) & W(2) are unknown constants that I am trying to fit to the data.

I know I haven't gone about this method the correct way, any help would be greatly appreciated!