Can't figure out why my function wont evaluate my input? Any suggestions? Thanks

I have a list of guess and a function

guess=[4,4;4,5;5,4]
fun=@(x,y)(1.5-x+x*y)^2+(2.25-x+x*(y^2))^2+(2.65-x+x*(y^3))^2
fun(guess(1,:))

I believe what I asking matlab is evaluate this function for row1 and all its columns which I believe is (4 4) but matlab outputs not enough input arguments please help!! Am I not grabbing position (4,4).

I tried this inputs just to see matlab output

guess(1,:)
output=[4 4]

Therefore I am totally confused as to why it does not work? Thanks for any assistance!! :)

Answer 1

[Walter Roberson]

You defined your anonymous function as requiring two arguments, x and y. You are, instead, passing in a single argument that is a row with two columns. You need to rewrite in those terms

fun=@(x)(1.5 - x(:,1) + x(:,1).*x(:,2)).^2 + (2.25 - x(:,1) + x(:,1) .* (x(:,2).^2)).^2 + (2.65 - x(:,1) + x(:,1) .* (x(:,2).^3)).^2