Learning notes for Matlab (8) handle graphics

Handle graphics: refers to a system of graphical objects that execute functions for graphics and Visualization in MATLAB. each system is composed of a series of attributes. you can use these attributes to control the behavior and display results. i. Handle

When MATLAB constructs a graphic object, it will specify a identifier (handle) for the object. You can use this handle to obtain the graphic attributes through the set and get functions. For example, the following statement returns a line handle for a graph with h:

X =;
Y = x. ^ 3;
H = plot (x, y );

You can use the handle to set the attributes of this object. For example, you can set the color attributes of this object:

Set (H, 'color', 'red ')

Of course, you can also set its attributes when calling the plotting function, such:

H = plot (X, Y, 'color', 'red ');

When you query the linear attributes, such:

Get (H, 'linewidth ')

MATLAB returns one:

Ans =
0.5000

You can use the handle to view all the attributes of the object:

Get (h)

Shown as follows:

Color: [1 0 0]
Erasemode: 'normal'
Linestyle :'-'
Linewidth: 0.5000
Marker: 'none'
Markersize: 6
Markeredgecolor: 'auto'
Markerfacecolor: 'none'
Xdata: [1x10 double]
Ydata: [1x10 double]
Zdata: [1x0 double]
Beingdeleted: 'off'
Buttondownfcn: []
Children: [0x1 double]
Clipping: 'on'
Createfcn: []
Deletefcn: []
Busyaction: 'queue'
Handlevisibility: 'on'
Hittest: 'on'
Interruptible: 'on'
Selected: 'off'
Selectionhighlight: 'on'
Tag :''
Type: 'line'
Uicontextmenu: []
Userdata: []
Visible: 'on'
Parent: 151.0012
Displayname :''
Xdatamode: 'manual'
Xdatasource :''
Ydatasource :''
Zdatasource :''

Ii. graphic objects

A graphical object is the most basic unit used to display graphics and user interface components. These objects are organized by hierarchies as follows: