中文说明：模式识别中的bayes判别分析算法，ML法能够很好的估计信号的信噪比,用平面波展开法计算二维声子晶体带隙,利用最小二乘法进行拟合多元非线性方程，对于初学matlab的同学会有帮助，本程序的性能已经超过其他算法。
English Description：
Pattern recognition of Bayes discriminant analysis algorithm, the ML method can very good estimates of the signal to noise ratio, using the plane wave expansion method calculation of two-dimensional phononic crystal band gap, using least squares fitting multivariate nonlinear equation, for the beginner will help matlab students, the performance of the program has more than other algorithms.