ezplot(f) plots a symbolic expression, equation, or function f. By default, ezplot plots a univariate expression or function over the range [–2π 2π] or over a subinterval of this range. If f is an equation or function of two variables, the default range for both variables is [–2π 2π] or over a subinterval of this range.

ezplot(f,[min,max]) plots f over the specified range. If f is a univariate expression or function, then [min,max] specifies the range for that variable. This is the range along the abscissa (horizontal axis). If f is an equation or function of two variables, then [min,max] specifies the range for both variables, that is the ranges along both the abscissa and the ordinate.

ezplot(f,[xmin,xmax,ymin,ymax]) plots f over the specified ranges along the abscissa and the ordinate. For this syntax, f needs two variables. If f is univariate, this syntax throws an error.

ezplot(f,fign) displays the plot in the plot window with the number fign. The title of each plot window contains the word Figure and the number, for example, Figure 1, Figure 2, and so on. If the plot window with the number fign is already opened, ezplot overwrites the content of that window with the new plot.

ezplot(x,y) plots the parametrically defined planar curve x = x(t) and y = y(t) over the default range 0 <= t <= 2π or over a subinterval of this range.

ezplot(x,y,[tmin,tmax]) plots x = x(t) and y = y(t) over the specified range tmin <= t <= tmax.

ezplot(f,figure_handle) plots f in the plot window identified by the handle figure_handle.

Tips

If you do not specify a plot range, ezplot uses the interval [–2π 2π] as a starting point. Then it can choose to display a part of the plot over a subinterval of [–2π 2π] where the plot has significant variation. Also, when selecting the plotting range, ezplot omits extreme values associated with singularities.
ezplot open a plot window and displays a plot there. If any plot windows are already open, ezplot does not create a new window. Instead, it displays the new plot in the currently active window. (Typically, it is the window with the highest number.) To display the new plot in a new plot window or in an existing window other than that with highest number, use fign.
If f is an equation or function of two variables, then the alphabetically first variable defines the abscissa (horizontal axis) and the other variable defines the ordinate (vertical axis). Thus, ezplot(x^2 == a^2,[-3,3,-2,2]) creates the plot of the equation x² = a² with –3 <= a <= 3 along the horizontal axis, and –2 <= x <= 2 along the vertical axis.

Input Arguments

`f`	Symbolic expression, equation, or function.
`[min,max]`	Numbers specifying the plotting range. For a univariate expression or function, the plotting range applies to that variable. For an equation or function of two variables, the plotting range applies to both variables. In this case, the range is the same for the abscissa and the ordinate. Default: `[-2pi,2pi]` or its subinterval.
`[xmin,xmax,ymin,ymax]`	Numbers specifying the plotting range along the abscissa (first two numbers) and the ordinate (last two numbers). Default: `[-2pi,2pi,-2pi,2pi]` or its subinterval.
`fign`	Number of the figure window where you want to display a plot. Default: If no plot windows are open, then 1. If one plot window is open, then the number in the title of that window. If more than one plot window is open, then the highest number in the titles of open windows.
`x,y`	Symbolic expressions or functions defining a parametric curve x = x(t) and y = y(t).
`[tmin,tmax]`	Numbers specifying the plotting range for a parametric curve. Default: `[0,2*pi]` or its subinterval.
`figure_handle`	Figure handle specifying the plot window in which you create or modify a plot. Default: Current figure handle returned by `gcf`.

Examples

Plot the expression erf(x)*sin(x) over the range [–π, π]:

syms x
ezplot(erf(x), [-pi, pi])

Plot this equation over the default range:

syms x y
ezplot(x^2 == y^4)

Create this symbolic function f(x, y):

syms x y
f(x, y) = sin(x + y)*sin(x*y);

Plot this function over the default range:

ezplot(f)

Plot this parametric curve:

syms t
x = t*sin(5*t);
y = t*cos(5*t);
ezplot(x, y)

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ezplot - Plot symbolic expression, equation, or function

Syntax

Description