Matlab 手写输入板 因为 想做个手写数字识别，就先做了这手写输入的面板，这是我根据 matlab 中文论坛里的一篇文档写的。M 文件比较麻烦，删掉了些注释。 下面是 GUI 和 M 文件 M文件直接从控件开始吧 % --- Executes on mouse press over figure background, over a disabled or % --- inactive control, or over an axes background. function figure1_WindowButtonDownFcn(hObject, eventdata, handles) global draw_enable global x; global y; global h1; draw_enable=1; if draw_enable==1 %定义一个标志，1表示绘图，0表示停止绘图 p=get(gca,'currentpoint'); x(1)=p(1); y(1)=p(3); end %鼠标按下,获取当前坐标 % --- Executes on mouse motion over figure - except title and menu. function figure1_WindowButtonMotionFcn(hObject, eventdata, handles) global draw_enable; global x; global y; global h1; p=get(gca,'currentpoint'); if draw_enable==1 x(2)=p(1); y(2)=p(3); h1=line(x,y,'EraseMode','xor','LineWidth',5,'color','b'); %鼠标第一次移动后的坐标为x(2),y(2) 

x(1)=x(2); y(1)=y(2); end %鼠标移动时，随时更新折线的数据 % --- Executes on mouse press over figure background, over a disabled or % --- inactive control, or over an axes background. function figure1_WindowButtonUpFcn(hObject, eventdata, handles) global draw_enable; draw_enable=0; % --- Executes on button press in pushbutton1. function pushbutton1_Callback(hObject, eventdata, handles) axes(handles.axes1); cla; axes('Position',[19.8 12.923 70.2 15.462],'tag','axes1'); %清空，但cla是清楚坐标抽，故在下面又建立一个坐标轴，且取tag名为axes1 效果图