Problem with function handling

Hi everyone, please if anyone can help me with this, I would be really grateful. I'm trying doing this:

fun=@(z) beta.*(abs(1-z(1).*(1-x{1}/y{1})).*abs(1-z(2).*(1-x{2}/y{2})).*...
    abs(1-z(3).*(1-x{3}/y{3})).*abs(1-z(4).*(1-x{4}/y{4})))-alpha;

where:

for ii=1:size(X,1)
    for i=1:m
        x{i}(ii)=sum(X{ii}(n(i,1):n(i,2)));
    end
end
for i=1:m
    y{i}=sum(Y(n(i,1):n(i,2)));
end

There is a possibility to simplify the function "fun" (as a product) by including this, for example, into a for loop?

I'm trying using this:

for i=1:m 
   fun=@(z) beta.*prod(abs(1-z(i).*(1-x{i}/y{i})));
end

but it doesn't work. What should I do?

Thanks in advance

[Walter Roberson]

Please do not close questions that have an answer.

Answer 1

[Guillaume]

I'm really not clear what are variables (inputs) to your function and what are constants. Why is your anonymous function just a function of z but not also x and y? Also, why are x and y cell arrays?

As far as I can tell your equation is

result = beta * prod(1 - z .* (1 - x./y)) - alpha

assuming that z, x, and y are all vectors or matrices of the same size.