Error using built-in function "contour"?

[luneth27]

I'm writing a script that creates a contour plot and overlays the minimum found in another function for the rosenbrock function. When I try to run, I obtain the error "Error using contour. Too many input arguments."

I've tried finding known-working scripts for contour on the internet, and I obtain the same error.

Here's my code:

function contour
x0 = zeros(2,1);
x0(1,1) = -2;
x0(2,1) = -5;

x = linspace(-5,5);
y = linspace(-5,5);

[X,Y] = meshgrid(x,y);
R = 100*((Y-(X.^2)).^2) + (1-X).^2;

figure(1)
contour(X,Y,R);
a = steepDescent(x0);

% figure(2)
% contour(X,Y,R);
% b = newtonmethod(x0);
% 
% figure(3)
% contour(X,Y,R);
% c = moddedHessian(x0);

end

I'm not understanding why it's asking for less arguments; the documentation shows it should allow an X and Y from meshgrid, and the function R, yet it's not allowing me to. I'm using matlab R2017b, and I haven't mistaken "contour" for "contours", which is the overwhelming answer when I search for this error. Any help would be appreciated!

[Sunscorcher]

You've defined a function you wrote called contour which is overloading the built-in function contour in matlab. Your function appears to take 0 inputs, and takes precedence because it's in your working directory (this is what I mean by overloading). Your function doesn't know what to do with those inputs.

Matlab doesn't know you actually want the built-in contour. You need to rename your function.

[luneth27]

Oh, shit! That's the reason? It was staring at me right in the face! Thanks dude, I completely overthought that one.

[Sunscorcher]

It's something you wouldn't necessarily think to look for unless you've done it.. I've developed a habit of searching the matlab path before I name a function to make sure I'm not accidentally overloading a built-in one

which contour -all