figure (1);
     fplot (@sin, [-10, 10]);
     figure (2);
     fplot (@cos, [-10, 10]);

— Function File: figure (n)
— Function File: figure (n, property, value, ...)

Set the current plot window to plot window n. If no arguments are specified, the next available window number is chosen.

Multiple property-value pairs may be specified for the figure, but they must appear in pairs.

— Function File: axes ()
— Function File: axes (property, value, ...)
— Function File: axes (h)

Create an axes object and return a handle to it.

— Function File: line ()
— Function File: line (x, y)
— Function File: line (x, y, z)
— Function File: line (x, y, z, property, value, ...)

Create line object from x and y and insert in current axes object. Return a handle (or vector of handles) to the line objects created.

Multiple property-value pairs may be specified for the line, but they must appear in pairs.

— Function File: patch ()
— Function File: patch (x, y, c)
— Function File: patch (x, y, z, c)
— Function File: patch (fv)
— Function File: patch ('Faces', f, 'Vertices', v, ...)
— Function File: patch (..., prop, val)
— Function File: patch (h, ...)
— Function File: h = patch (...)

Create patch object from x and y with color c and insert in the current axes object. Return handle to patch object.

For a uniform colored patch, c can be given as an RGB vector, scalar value referring to the current colormap, or string value (for example, "r" or "red").

If passed a structure fv contain the fields "vertices", "faces" and optionally "facevertexcdata", create the patch based on these properties.

The optional return value h is a graphics handle to the created patch object.

See also: fill.

— Function File: fill (x, y, c)
— Function File: fill (x1, y1, c1, x2, y2, c2)
— Function File: fill (..., prop, val)
— Function File: fill (h, ...)
— Function File: h = fill (...)

Create one or more filled patch objects.

The optional return value h is an array of graphics handles to the created patch objects.

See also: patch.

— Function File: surface (x, y, z, c)
— Function File: surface (x, y, z)
— Function File: surface (z, c)
— Function File: surface (z)
— Function File: surface (..., prop, val)
— Function File: surface (h, ...)
— Function File: h = surface (...)

Plot a surface graphic object given matrices x, and y from meshgrid and a matrix z corresponding to the x and y coordinates of the surface. If x and y are vectors, then a typical vertex is (x(j), y(i), z(i,j)). Thus, columns of z correspond to different x values and rows of z correspond to different y values. If x and y are missing, they are constructed from size of the matrix z.

Any additional properties passed are assigned to the surface.

The optional return value h is a graphics handle to the created surface object.

See also: surf, mesh, patch, line.

— Built-in Function: drawnow ()
— Built-in Function: drawnow ("expose")
— Built-in Function: drawnow (term, file, mono, debug_file)

Update figure windows and their children. The event queue is flushed and any callbacks generated are executed. With the optional argument "expose", only graphic objects are updated and no other events or callbacks are processed. The third calling form of drawnow is for debugging and is undocumented.

— Function File: refresh ()
— Function File: refresh (h)

Refresh a figure, forcing it to be redrawn. Called without an argument the current figure is redrawn, otherwise the figure pointed to by h is redrawn.

See also: drawnow.

     hold on;
     x = -10:0.1:10;
     plot (x, sin (x));
     plot (x, cos (x));
     hold off;

— Function File: newplot ()

Prepare graphics engine to produce a new plot. This function is called at the beginning of all high-level plotting functions. It is not normally required in user programs.

— Command: hold
— Command: hold state
— Function File: hold (hax, ...)

Toggle or set the 'hold' state of the plotting engine which determines whether new graphic objects are added to the plot or replace the existing objects.

hold on

Retain plot data and settings so that subsequent plot commands are displayed on a single graph.

hold all

Retain plot line color, line style, data and settings so that subsequent plot commands are displayed on a single graph with the next line color and style.

hold off

Clear plot and restore default graphics settings before each new plot command. (default).

hold

Toggle the current 'hold' state.

When given the additional argument hax, the hold state is modified only for the given axis handle.

To query the current 'hold' state use the ishold function.

See also: ishold, cla, newplot, clf.

— Command: ishold
— Function File: ishold (h)

Return true if the next plot will be added to the current plot, or false if the plot device will be cleared before drawing the next plot.

Optionally, operate on the graphics handle h rather than the current plot.

See also: hold.

— Function File: clf ()
— Function File: clf ("reset")
— Function File: clf (hfig)
— Function File: clf (hfig, "reset")
— Function File: h = clf (...)

Clear the current figure window. clf operates by deleting child graphics objects with visible handles (handlevisibility = on). If hfig is specified operate on it instead of the current figure. If the optional argument "reset" is specified, all objects including those with hidden handles are deleted.

The optional return value h is the graphics handle of the figure window that was cleared.

See also: cla, close, delete.

— Function File: cla ()
— Function File: cla ("reset")
— Function File: cla (hax)
— Function File: cla (hax, "reset")

Delete the children of the current axes with visible handles. If hax is specified and is an axes object handle, operate on it instead of the current axes. If the optional argument "reset" is specified, also delete the children with hidden handles.

See also: clf.

— Command: shg

Show the graph window. Currently, this is the same as executing drawnow.

See also: drawnow, figure.

— Function File: delete (file)
— Function File: delete (handle)

Delete the named file or graphics handle.

Deleting graphics objects is the proper way to remove features from a plot without clearing the entire figure.

See also: clf, cla, unlink.

— Command: close
— Command: close (n)
— Command: close all
— Command: close all hidden

Close figure window(s) by calling the function specified by the "closerequestfcn" property for each figure. By default, the function closereq is used.

See also: closereq.

— Function File: closereq ()

Close the current figure and delete all graphics objects associated with it.

See also: close, delete.

     xlabel ('{\bf H} = a {\bf V}')

     x = 0:0.01:3;
     plot(x,erf(x));
     hold on;
     plot(x,x,"r");
     axis([0, 3, 0, 1]);
     text(0.65, 0.6175, strcat('\leftarrow x = {2/\surd\pi',
     ' {\fontsize{16}\int_{\fontsize{8}0}^{\fontsize{8}x}}',
     ' e^{-t^2} dt} = 0.6175'))