matlab GUI callback 函数实现

搞了一下午，看了些资料，终于弄好了matlab GUI中的回调函数。
效果图见底部~

umtitled3.m:

function varargout = untitled3(varargin)
% UNTITLED3 M-file for untitled3.fig
%      UNTITLED3, by itself, creates a new UNTITLED3 or raises the existing
%      singleton*.
%
%      H = UNTITLED3 returns the handle to a new UNTITLED3 or the handle to
%      the existing singleton*.
%
%      UNTITLED3('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in UNTITLED3.M with the given input arguments.
%
%      UNTITLED3('Property','Value',...) creates a new UNTITLED3 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before untitled3_OpeningFunction gets called.  An
%      un