MATLAB: How to automatic segmentation signal segmentationsignal hi guys i have a pcg signal i want to segment the signal into 4 segment, s1 & s2 = 1 segment how to do it? thankss Best Answer The findchangepts (link) function (introduced in R2016a) is perfect for this: D = load('matlab.mat');data = D.data;Fs = D.fs;t = linspace(0, 1, numel(data))/Fs;cp = findchangepts(data, 'Statistic','std', 'MinDistance',2E+3, 'MaxNumChanges',7);figureplot(t, data)hold onYL = ylim;plot([t(cp); t(cp)], YL(:)*ones(1,numel(cp)), '-r', 'LineWidth',1)hold offproducing: The ‘cp’ vector are the change points corresponding to the vertical red lines in the plot. The findchangepts function takes about 15 seconds to complete this (on my desktop, using tic and toc), Experiment to get the result you want. Related SolutionsMATLAB: How to segment the signal based on amplitude change. Use the findchangepts (link) function (introduced in R2016a): D = load('t1.mat');t1 = double(D.t1);[cp,res] = findchangepts(t1(:,3), 'MaxNumChanges',2, 'Statistic','std');figureplot(t1(:,1), t1(:,3))hold onplot(repmat(t1(cp,1),1,2)', repmat(ylim',1,numel(cp)), 'LineWidth',2)hold offgridSee the documentation for the function for detailks on the various options. MATLAB: Labels for bar plots If I understand correctly what you are asking, see: How can I add the values to the top of the bars? for one approach. Related QuestionTotal energy in Time and Frequency DimainHow to Segment EMG data into time intervalsConcatenation or addition of matrixHow to use textscan to read the 2nd column and ignore the string or non numerical valuesExtract elements of a list using their indices
Best Answer