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随笔分类 -  Signal Processing

摘要:计算方差特征,协方差矩阵距离的工具箱 Github地址:https://github.com/alexandrebarachant/covariancetoolbox 介绍: #### This toolbox is no longer supported by its author. The co 阅读全文
posted @ 2020-12-28 15:20 virter 阅读(387) 评论(0) 推荐(0)
摘要:原始的topoEEG.m文件中的griddata函数有问题,若画下图所示的地形图,将topoEEG.m中的griddata函数稍改一下即可: % [Xi,Yi,Zi] = griddata(y,x,Vl,yi',xi,'invdist'); % Interpolate data % [Xi,Yi,Z 阅读全文
posted @ 2020-12-24 00:39 virter 阅读(424) 评论(0) 推荐(0)
摘要:用于脑电分析的各类源码,包括功率谱密度检测,事件相关同步/去同步分析,脑地形图绘制等(EEG analysis for various types of source, including the power spectral density detection, event-related syn 阅读全文
posted @ 2020-12-23 19:33 virter 阅读(218) 评论(0) 推荐(0)
摘要:先上效果图: Matlab框架代码: %% Author Information % Author: Guoyang Liu % Email: virter1995@outlook.com % Date: 2019-11-28 (Update 1: 2020-12-14) % Function: P 阅读全文
posted @ 2020-12-14 00:31 virter 阅读(6372) 评论(33) 推荐(3)
摘要:Matlab 文档:https://ww2.mathworks.cn/help/signal/ref/spectrogram.html#bultmx7-x 调用:[~,f,t,ps] = spectrogram(data,opt.window,opt.noverlap,freqRange(1):fr 阅读全文
posted @ 2020-12-13 21:25 virter 阅读(2047) 评论(0) 推荐(0)
摘要:这两天忽然发现Matlab 2020b很多工具箱更新了很多feature,在此挑几个当备忘录存一下: Wavelet Toolbox Release Notes https://www.mathworks.com/help/wavelet/release-notes.html https://www 阅读全文
posted @ 2020-12-10 15:34 virter 阅读(482) 评论(0) 推荐(0)
摘要:运动想象脑电存在ERD/ERS现象,以前看了很多文章,是说运动想象时大脑对侧有ERD,同侧出现ERS,但经过自己的实验和进一步的文献调研,发现应该是运动想象时大脑对侧出现的ERD现象要比同侧出现ERD现象更明显。而ERS时出现在运动想象之后的放松期。同侧的ERS出现可能要比对侧出现ERS现象时间要早 阅读全文
posted @ 2020-12-10 13:51 virter 阅读(2855) 评论(0) 推荐(0)
摘要: 阅读全文
posted @ 2020-12-08 21:37 virter 阅读(805) 评论(0) 推荐(0)
摘要:题目:Time-local Fourier analysis with a scalable, phase-modulated analyzing function: the S-transform with a complex window 地址:https://www.sciencedirect 阅读全文
posted @ 2020-12-08 21:33 virter 阅读(129) 评论(0) 推荐(0)
摘要:clear; load('FormatData_setA_998.mat', 'X', 'Y'); % X: 5000x12x998 double % Y: 998x1 double % multiChFig = figure; selIdx = 3; plotMap = X(:,:,selIdx) 阅读全文
posted @ 2020-09-09 00:05 virter 阅读(1096) 评论(0) 推荐(0)
摘要:之前做脑机接口上位机的时候需要对数据进行实时滤波,也就是需要对数据进行分段滤波,保存滤波器前一次的历史状态。翻了翻MATLAB官方文档的filter函数发现有这个功能,不过他们的函数说明是用相位及延迟进行设置,看了半天没理解什么意思,为了保险起见我自己造了个轮子实现简单的IIR滤波器。filter函 阅读全文
posted @ 2019-02-08 00:03 virter 阅读(2501) 评论(0) 推荐(0)