Documentation

This is machine translation

Translated by Microsoft
Mouse over text to see original. Click the button below to return to the English verison of the page.

我们为许可用户提供了部分翻译好的中文文档。您只需登录便可查阅这些文档

ezpolar

Easy-to-use polar coordinate plotter

Syntax

ezpolar(fun)
ezpolar(fun,[a,b])
ezpolar(axes_handle,...)
h = ezpolar(...)

Description

ezpolar(fun) plots the polar curve rho = fun(theta) over the default domain 0 < theta < 2π.

fun can be a function handle or a character vector (see the Tips section).

ezpolar(fun,[a,b]) plots fun for a < theta < b.

ezpolar(axes_handle,...) plots into the axes with handle axes_handle instead of the current axes (gca).

h = ezpolar(...) returns the handle to a line object in h.

Examples

collapse all

Plot the function $1+\cos(t)$ over the domain $[0,2\pi]$.

figure
ezpolar('1+cos(t)')

More About

collapse all

Tips

Passing the Function as a Character Vector

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

t.^2.*cos(t)

which represents an implicitly defined function, is written as

ezpolar('t^2*cos(t)')

That is, t^2 is interpreted as t.^2 in the character vector you pass to ezpolar.

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 ezpolar.

fh = @(t) t.^2.*cos(t);
ezpolar(fh)

Note that when using function handles, you must use the array power, array multiplication, and array division operators (.^, .*, ./) since ezpolar does not alter the syntax, as in the case with character vector inputs.

Passing Additional Arguments

If your function has additional parameters, for example k1 and k2 in myfun:

function s = myfun(t,k1,k2)
s = sin(k1*t).*cos(k2*t);

then you can use an anonymous function to specify the parameters:

ezpolar(@(t)myfun(t,2,3))

Introduced before R2006a


Was this topic helpful?