How do I plot 3-dimentional graph of the following function? Can Plot3 function do this?

fun=@(x,y)100*(y-x^2)^2+(1-x)^2;

[Star Strider]

Also see my Answer to your Question Where's the bug in the following codes?.

[Shawn Miller]

Thanks, pls see my new comments on Where's the bug in the following codes?

Answer 1

[Walter Roberson]

fun = @(x,y)100*(y-x.^2).^2 + (1-x).^2;
x = linspace(-10,10);
y = linspace(-50,-30);
plot3d(x, y, fun(x,y))

[Shawn Miller]

Thanks Walter, it works, however, the graph is plotted only on a single line from (-10,-50) through (10,-30) (please see below, where I also label the axises and switch the grid on). So basically the result turns out to be a single parabola rather than a surface.

But do you know how to plot on an area of x and y axis, which is what I really want to get. And it should be like this...

[Steven Lord]

Your function is defined in such a way that you can pass x and y matrices, not just vectors or scalars, into it. Because of that take a look at the MESHGRID function to generate the data points at which you evaluate and plot your function.

[Shawn Miller]

Thanks Steven, you're right. Also thanks to Walter.