CHAPTER3

this code will help you to compute a ROC curve

前段时间在北大OJ平台上做的几个题目，主要用到几个知识点...(OJ platform some time ago at the university to do the subject ...)

说明：  主成分分析算法，有大量数据，初学者可以根据数据看程序，并且可以出现图像(Principal component analysis algorithm, there is a large amount of data, beginners can look at program according to the data, and can appear the image)

如何计算矩阵数据的协方差矩阵。还有在什么情况下只能计算均值、方差，而不能计算协方差，什么情下，只能计算协方差，但不能计算协方差矩阵。(How to calculate the matrix data covariance matrix. And under what circumstances can only calculation mean, variance, and not calculation covariance, what feeling, can only calculation covariance, but not calculation covariance matrix.)

第17章 数据统计和分析.zip。是从书中光盘里直接拷贝的代码，放在这里，与大家共享，共同交流，希望对大家有帮助。(Chapter 17 Statistics and analysis.zip)

求解辐射传递方程SSDN离散matlab程序(Solving the radiative transfer equation SSDN discrete matlab program)

matlab绘制三维Hilbert谱程序，保证可用。上传文件采用的是.txt形式，实际使用时只需要将后缀改为.m即可在matlab中运行。(matlab draw three-dimensional Hilbert spectrum procedures to ensure that available. Upload file uses a .txt form, the actual use of the suffix to .m only need to be run in matlab.)

说明：  Robot indexeur - Maroc El Mehdi El Oufir

运用遗传算法（GA）实现Schaffer s F6 函数的优化(The use of genetic algorithms (GA) to optimize Schaffer s F6 function)

用于图像的分形维数计算，应用boxcount方法，首先对图像进行二值化处理，然后通过搜索白色区域，进行分形计算。(used to the calculation of the fractal dimension,and using the boxcount method,to do the process,and find the white area,to calculation the fractal dimension)