ezplot

(Not recommended) Easy-to-use function plotter

ezplot is not recommended. Use fplot instead.

Syntax

ezplot(fun)
ezplot(fun,[xmin,xmax])
ezplot(fun2)
ezplot(fun2,[xymin,xymax])
ezplot(fun2,[xmin,xmax,ymin,ymax])
ezplot(funx,funy)
ezplot(funx,funy,[tmin,tmax])
ezplot(...,fig)
ezplot(ax,...)
h = ezplot(...)


Description

ezplot(fun) plots the expression fun(x) over the default domain -2π < x < 2π, where fun(x) is an explicit function of only x.

fun can be a function handle, a character vector, or a string.

ezplot(fun,[xmin,xmax]) plots fun(x) over the domain: xmin < x < xmax.

For an implicit function, fun2(x,y):

ezplot(fun2) plots fun2(x,y) = 0 over the default domain -2π < x < 2π, -2π < y < 2π.

ezplot(fun2,[xymin,xymax]) plots fun2(x,y) = 0 over xymin < x < xymax and xymin < y < xymax.

ezplot(fun2,[xmin,xmax,ymin,ymax]) plots fun2(x,y) = 0 over xmin < x < xmax and ymin < y < ymax.

ezplot(funx,funy) plots the parametrically defined planar curve funx(t) and funy(t) over the default domain 0 < t < 2π.

ezplot(funx,funy,[tmin,tmax]) plots funx(t) and funy(t) over tmin < t < tmax.

ezplot(...,fig) plots into the figure window identified by fig. Use any of the input argument combinations in the previous syntaxes that include a domain. The domain options are [xmin xmax], [xymin xymax], [xmin xmax ymin ymax], and [tmin tmax].

ezplot(ax,...) plots into the axes ax instead of the current axes (gca).

h = ezplot(...) returns either a chart line or contour object.

Examples

Plot an Explicit Function

Plot the explicit function $$x^2$$ over the domain $$[-2\pi ,2\pi ]$$.

ezplot('x^2')

The default domain is $$[-2\pi ,2\pi ]$$.

Plot an Implicit Function

Plot the implicitly defined function $$x^2-y^4=0$$ over the domain $$[-2\pi ,2\pi ]$$.

ezplot('x^2-y^4')

The default domain is $$[-2\pi ,2\pi ]$$.

Tips

Passing the Function as a Character Vector or String

Array multiplication, division, and exponentiation are always implied in the expression you pass to ezplot. For example, the MATLAB^® syntax for a plot of the expression

x.^2 - y.^2

which represents an implicitly defined function, is written as

ezplot('x^2 - y^2')

That is, x^2 is interpreted as x.^2 in the character vector or string you pass to ezplot.

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 ezplot.

fh = @(x,y) x.^2 + y.^3 - 2*y - 1;
ezplot(fh)
axis equal

Note that when using function handles, you must use the array power, array multiplication, and array division operators (.^, .*, ./) since ezplot 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:

ezplot(@(x,y)myfun(x,y,2))

Extended Capabilities

GPU Arrays

Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.

Usage notes and limitations:

• This function accepts GPU arrays, but does not run on a GPU.

For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).

Distributed Arrays

Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

Usage notes and limitations:

• This function operates on distributed arrays, but executes in the client MATLAB.

For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).