数据进行函数拟合，拟合图像直接显现，分别使用n次拟合-Data function fitting, fitting images directly show, respectively, using the n-th Fitting

Codec ldpc code implementation Interpolation and fitting, solution of equations, data analysis, It draws on principal component analysis algorithm (PCA).

Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Since writing the curvature calculation function, Interpolation and fitting, solution of equations, data analysis.

Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Interpolation and fitting, solution of equations, data analysis, Gabor wavelet transform and PCA face recognition code.