ezmesh
(Not recommended) Easy-to-use 3-D mesh plotter
ezmesh is not recommended. Use fmesh instead.
Syntax
ezmesh(fun)
ezmesh(fun,domain)
ezmesh(funx,funy,funz)
ezmesh(funx,funy,funz,[smin,smax,tmin,tmax])
ezmesh(funx,funy,funz,[min,max])
ezmesh(...,n)
ezmesh(...,'circ')
ezmesh(axes_handle,...)
h = ezmesh(...)
Description
ezmesh(fun) creates a graph of fun(x,y) using the
mesh function. fun is
plotted over the default domain: -2π < x < 2π, -2π <
y < 2π.
fun can be a function handle, a character vector, or a string (see the
Tips
section).
ezmesh(fun,domain) plots fun
over the specified domain. domain can be either a 4-by-1
vector [xmin, xmax, ymin,
ymax] or a 2-by-1 vector [min, max]
(where min < x < max,
min < y < max).
ezmesh(funx,funy,funz) plots the parametric
surface funx(s,t), funy(s,t), and
funz(s,t) over the square: -2π < s < 2π, -2π
< t < 2π.
ezmesh(funx,funy,funz,[smin,smax,tmin,tmax]) or
ezmesh(funx,funy,funz,[min,max]) plots the parametric
surface using the specified domain.
ezmesh(...,n) plots fun over
the default domain using an n-by-n grid. The default
value for n is 60.
ezmesh(...,'circ') plots fun
over a disk centered on the domain.
ezmesh(axes_handle,...) plots into the axes with
handle axes_handle instead of the current axes (gca).
h = ezmesh(...) returns the handle to a surface
object in h.
Examples
Mesh Plot of Mathematical Function
Create a mesh plot of the function over a 40-by-40 grid.
fh = @(x,y) x.*exp(-x.^2-y.^2); ezmesh(fh,40)
Set the mesh lines to a uniform blue color by setting the colormap to a single color.
colormap([0 0 1])
Tips
Passing the Function as a Character Vector or String
Array multiplication, division, and exponentiation are always implied in the expression
you pass to ezmesh. For example, the MATLAB® syntax for a mesh plot of the expression
sqrt(x.^2 + y.^2);
is written as
ezmesh('sqrt(x^2 + y^2)')That is, x^2 is interpreted as x.^2 in the
character vector or string you pass to ezmesh.
If the function to be plotted is a function of the variables u and
v (rather than x and y), then the
domain endpoints umin, umax, vmin,
and vmax are sorted alphabetically. Thus, ezmesh('u^2 -
v^3',[0,1],[3,6]) plots u2 -
v3 over 0 < u < 1,
3 < v < 6.
Passing a Function Handle
Function handle arguments must point to functions that use MATLAB syntax. For example, the following statements define an anonymous function and
pass the function handle fh to ezmesh.
fh = @(x,y) sqrt(x.^2 + y.^2); ezmesh(fh)
Note that when using function handles, you must use the array power, array
multiplication, and array division operators (.^, .*, ./) since
ezmesh does not alter the syntax, as in the case with character vector
or string inputs.
Passing Additional Arguments
If your function has additional parameters, for example k in
myfun:
function z = myfun(x,y,k) z = x.^k - y.^k - 1;
then you can use an anonymous function to specify that parameter:
ezmesh(@(x,y)myfun(x,y,2))