直方图拟合GUI程序，能自动生成曲线，方便快捷，方法简单-Histogram Fitting GUI program can automatically generate the curve, convenient, simple

用最小二乘法进行曲线拟合，代码有注释，方便查看。可以用于实时数据显示和拟合-Using the least squares curve fitting, code comments, convenient viewing. Can be used for real-time data display and fitting