注意：该函数必须使用MATLAB 2018b运行。

该函数是研究微分方程平面自治系统的交互式工具。

pplane8  is an interactive tool for studying planar autonomous systems of differential equations.

当该函数运行时，将打开一个pplane8设置窗口。

When pplane8 is executed, a pplane8 Setup window is opened.

用户可以输入微分方程，并使用设置窗口中的交互控件指定显示窗口。

The user may enter the differential equation and specify a display window using the interactive controls in the Setup window. 

最多可指定4个参数。

Up to 4 parameters may also be specified.

此外，用户还可以选择显示的字段类型和字段点数。

In addition the user is give a choice of the type of field displayed and the number of field points.

当按下设置窗口上的继续按钮时，将打开pplane8显示窗口，并为系统显示所请求类型的字段。

When the Proceed button is pressed on the Setup window, the pplane8 Display window is opened, and a field of the type requested is displayed for the system.

当在pplane8显示窗口中按下鼠标按钮时，将计算并绘制具有该初始条件的系统解。

When the mouse button is depressed in the pplane8 Display window, the solution to the system with that initial condition is calculated and plotted.

完整源码下载地址：

http://page2.dfpan.com/fs/clcbj2a2122941687a4/  

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