zhang_zheng_you_biao_ding_matlab

Face Recognition Based on Polar Frequency Features

代码为QPSK半分析方法计算误码率，下载后直接运行就行了(code for QPSK semi-analytic method BER, downloaded directly running on the line)

说明：  MidPoint 中点公式求取导数 ThreePoint 三点法求函数的导数 FivePoint 五点法求函数的导数 DiffBSample 三次样条法求函数的导数 SmartDF 自适应法求函数的导数 CISimpson 辛普森数值微分法法求函数的导数 Richason 理查森外推算法求函数的导数 ThreePoint2 三点法求函数的二阶导数 FourPoint2 四点法求函数的二阶导数 FivePoint2 五点法求函数的二阶导数 Diff2BSample 三次样条法求函数的二阶导数 (Interpolation function)

LMS算法使用matlab语言实现仿真 用于自适应滤波器(LMS algorithm using matlab simulation language used to achieve adaptive filter)

迂回位相编码全息再现，是基于MATLAB的全息再现术。(Detour phase encoding holographic reproduction is based on the MATLAB representation of the holographic technique.)

将利用HBMAT读出来的hb文件转换为matlab稀疏存贮，得到结构刚度阵质量阵等等(Will be read out by HBMAT hb files into matlab sparse storage, mass matrix by matrix stiffness, etc.)

matlab code for Tools for NIfTI and ANALYZE image

训练错误率和交叉验证错误率相等，在样本比较大时，这个结果是可以预期的；训练错误率一般低于测试错误率，但是当样本数据比较少时，实验也出现了意外，样本多的那组测试错误率比样本少的训练错误率还要小；在本实验中，同组数据的交叉验证错误率比独立测试错误率高，这个反常现象是因为样本的原因所致，交叉验证的样本小，而独立测试时所用训练样本数目大，因而出现这种情况。分类线上，fisher准则是一条直线，而贝叶斯分类器实际上是一个类似椭圆的封闭曲线；很明显，贝叶斯分类器比fisher分类器要好。(Training error rate and cross- validation error rates are equal, the larger the sample , this result is to be expected training error rate is generally lower than the test error rate , but when comparing the sample data came from the experiment there was an accident, that more samples group test error rate less than the training sample error rate is smaller In this experiment, the same set of data cross-validation error rate than independent test error rate, this anomaly is because the sample of reasons , cross-validation sample is small,And independent testing large number of training samples used , resulting in this situation.Classification online , fisher criterion is a straight line , while the Bayesian classifier is actually a closed curve similar to elliptical It is clear that the Bayesian classifier is better than the fisher classifier .)

a bunch of useful functions for image reconstruction

在Matlab环境下，关于近似熵的计算程序()