快速ICA的matlab m文件，是演示代码，可以直接运行。独立分量分析。使用了基于负熵极大值的牛顿迭代法来判断分离结果的非高斯性-Fast matlab m ICA files, is a demo code, you can directly run. Independent component analysis. The non Gauss used Newton iterative method based on negative entropy to determine the max

对离散点进行圆拟合，得到拟合圆的中心坐标和半径- [Z, R] = FITCIRCLE(X) fits a circle to the N points in X minimising geometric error (sum of squared distances the points to the fitted circle) using nonlinear least squares (Gauss Newton)