cannot run the code because unknown about getMemberNames function

Question

Tu Nguyen 2022-3-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1676889-cannot-run-the-code-because-unknown-about-getmembernames-function

评论： Cris LaPierre 2022-3-21

Dear all,

This is the answer of my professor about the ECG detection, but I cant run that code. Anyone know how to fix this, please help me

clc;
close all;
clear all;
load ecg_sbj1
load ecg_sbj2
load ecg_sbj3
load ecg_sbj4
nms = getMemberNames(heartrates);
Unrecognized function or variable 'heartrates'.
for k = 1:heartrates.NumMembers
    
    v = getLabelValues(heartrates,k,["QRSregions" "Rpeaks"]);
    
    hr = diff(cellfun(@(x) x.Location,v));
    
    subplot(2,1,k)
    histogram(hr,0.5:0.025:1.5)
    legend("hrv = " + std(hr))
    ylabel(nms(k))
    ylim([0 6])
end
function [labelVals,labelLocs] = findQRS(x,t,parentLabelVal,parentLabelLoc,varargin)
labelVals = cell(2,1);
labelLocs = cell(2,1);
if nargin<5
    Fs = 250;
else
    Fs = varargin{1};
end
df = 20;
load("trainedQTSegmentationNetwork","net")
for kj = 1:size(x,2)
    sig = x(:,kj);
      
    
    mitFSST = computeFSST(sig,Fs);
    
    
    netPreds = classify(net,mitFSST,MiniBatchSize==50);
    
    QRS = categorical([netPreds{1} netPreds{2}]',"QRS");
    msk = signalMask(QRS,MinLength==df,SampleRate==Fs);
    r = roimask(msk);
    
    
    labelVals{kj} = r.Value;
    labelLocs{kj} = r.ROILimits;
end
labelVals = vertcat(labelVals{:});
labelLocs = cell2mat(labelLocs);
end

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Answer 1

Cris LaPierre 2022-3-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1676889-cannot-run-the-code-because-unknown-about-getmembernames-function#answer_923534

You need the Signal Processing Toolbox in order to use getMemberNames. If it is included on your license, you can use theAdd-ons Explorer to add it.

However, once added, you will find that you do not have a variable names heartrates.

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Tu Nguyen 2022-3-21

I checked my toolbox and have getMemberNames in the toolbox, as I understand that the hearates is run each ecg signal that load above. But the code syill not run. Please help me run the code

Cris LaPierre 2022-3-21

I cannot create the variable for you. You must have code somewhere that does that already.

Each mat file of yours contains 2 variables - ecg and Fs. By loading them back to back the way you are doing, you will only be able to access the data in ecg_sbj4, as it overwrites all the others.

You may need to go back to your professor for more details.

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cannot run the code because unknown about getMemberNames function

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