PCM.MATLAB

matlab 实用教程（ppt，源代码） 包括画图 计算 变成(matlab Practical Guide (ppt, source code), including the calculation into a drawing)

MATLAB 牛顿下山法的一个小程序，原理就不详细说了。因牛顿迭代法受初值选取的限制，为防止迭代发散，对迭代过程再附加一项要求:|f(x(k+1))|<|f(x(k))|,将牛顿法迭代的结果:x(k+1) =x(k)-f(x(k))/f (x(k))和前一近似值x(k)适当加权平均做为新的改进值:x(k+1)=u*x(k+1) +(1-u)*x(k),其中u(0<> 迭代时u取1开始，逐次减半计算，直至附加要求符合为止。实例计算中x(k)=x(0)不变，只更新u和x(k+1)，直至:|f(x(k+1))|<|f(x(k))|（即|f(x(1))|<|f(x(0))|)，然后更新下山因子为u=1,继续以牛顿法迭代。(MATLAB Newton-down a small program, the principle is not explained in detail. Newton iteration by the initial value of the selected limit, in order to prevent additional iterative divergence, the iterative process a request: | f (x (k+1)) | < | f (x (k)) | Newton iteration Results: x (k+1) ' = X (k)-f (x (k))/f' (x (k)) and a previous approximation x (k), appropriately weighted average as a new improved value: x (k+1 ) = u* x (k+1) ' + (1-u)* x (k), where u (0 < u> iteration take successive calculated at 50 until the additional requirements found so far. examples of calculation of X ( k) = x (0) unchanged profile u and x (k+1, hungry) until: | f (x (k+1)) | < | f (x (k)) | (i.e. | f (x (1)) | < | f (x (0)) |), then profile downhill factor for u = 1, to continue to Newton iteration.)

说明：  matlab 画图的一些问题方法。很好的哦。。(matlab)

spxy分样本程序，可以对分析样本进行分类，建立预测模型(spxy algorithm to classify sample)

KNN分类方法，用于文本分类工作的研究。(KNN classification method, for text categorization of the research work)

在MATLAB环境中，进行数字图像处理中常用到的小波函数系列之四(In the MATLAB environment, to carry out commonly used in digital image processing of the wavelet function series of four)

matlab有关的常见的图像显示，图像信息读取，图像加噪，图形去噪，图像增强等一系列基本matlab实验代码及原理(matlab on the common image display, image information read, the image plus noise, graphics denoising, image enhancement and a series of basic principles of experimental code matlab)

该程序能够根据使用者的需要，通过调用相关的函数，完成数组的输入和输出，计算出该数组数据的平均值并输出。(The program can be based on user needs, by calling the related functions, complete the input and output of the array, the array data to calculate the average value and output.)

matlab中产生16QAM信号 星座图(generate 16QAM signal )

本程序:采用平面梁单元计算两铰抛物线拱的自由振动特性 输入参数： 无 输出结果： 前3阶振动频率及其相应的振型 (failed to translate)