yiqunjulei

pca（主成分分析）matlab实现，可以有效的提取数据的主元成分，降低数据矩阵的维数。(pca (Principal Component Analysis) Matlab implementation, can effectively extract data in the main ingredients, reduce the dimension of the data matrix.)

RPH tool is Matlab algoritm for Rock physics analysis

根据BP算法在MATLAB上实现，无需调用其NNET工具箱(According to BP algorithm in MATLAB to achieve, without calling its NNET Toolbox)

MATLAB 编程问题 大家可以交流下 加油啊 好东西(MATLAB programming problem we can exchange, under)

计算圆波导模式（例如TE21、TM11，可以输入不同的m、n值）的场分布。(Calculate the circular waveguide mode (eg TE21, TM11, you can enter a different m, n value) field distribution.)

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 .)

将GPS得到的经纬度，大地坐标，通过高斯投影正算，得到平面直角坐标 文件大小不够，再增加了高斯投影的pdf文档(The longitude, latitude and geodetic coordinates obtained by GPS are corrected by Gauss projection, and the plane rectangular coordinates are obtained.)

for simulink clarke transform

这是一个用matlab语言编写的俄罗斯方块的程序，很值得一看。(This is a language with the Russian box matlab program, it is worth a visit.)

IBMde股票图形示例，，含数据有布林线，平均移动线 (IBMde stock graphic example, with data Bollinger Bands, Moving Average Line)