Help with an error occurring

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G 2018-11-6

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评论： Walter Roberson 2019-9-11

              close all
              clear all
              clc
              unzip(fullfile('QT_Database-master.zip'))
              load(fullfile('QT_Database-master','QTData.mat'))
              QTData % store labeled signals along with the label definitions.
              head(QTData.Labels) %Use the head command to inspect the first few rows of the table contained in the Labels property of QTData.
              patientID = 1;
              signalVals = getSignal(QTData,patientID);
              labelVals = getLabelValues(QTData,patientID,'WaveformLabels_Chan1');
              displayWaveformLabels(signalVals(1,1:1000),labelVals.Value(1:1000))

I am getting an error

        Undefined function or variable 'displayWaveformLabels'.
            Error in Waveform_Segmentation_Example (line 16)
            displayWaveformLabels(signalVals(1,1:1000),labelVals.Value(1:1000)) 
            >>

Why am I getting this error?

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Answer 1

Stephen23 2018-11-6

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编辑：Stephen23 2018-11-6

The only mention of displayWaveformLabels I can find is on this page:

https://www.mathworks.com/help/signal/examples/waveform-segmentation-using-deep-learning.html?searchHighlight=displayWaveformLabels

That function is not included in the zip file available from GitHub, so presumably it is an undocumented function in one of the two toolboxes mentioned at the top of the page. Do you have both of the those toolboxes installed and have current licenses for them?

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Stephen23 2018-11-6

编辑：Stephen23 2018-11-6

"What is TMW?"

TMW == The MathWorks, the company who develop and sell the products MATLAB, Simulink, etc. They also own this website (including this forum), which is why the "Contact Us" link at the top of each page will get you in touch with them. Try selecting Contact Us -> Contact Support -> Create Service Request

G 2018-11-6

Got it. I've never seen it abbreviated like that. Thanks

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Answer 2

Walter Roberson 2019-2-10

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https://ww2.mathworks.cn/matlabcentral/answers/428210-help-with-an-error-occurring#answer_360353

displayWaveformLabels is under the MATLAB installation in examples/deeplearning_shared/main/displayWaveformLabels.m . This requires R2018b or later for this path.

That directory is not on your MATLAB path by default.

When you use openExample() with the right example name, then openExample() will copy the file onto your path.

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Answer 3

madhan ravi 2018-11-6

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编辑：madhan ravi 2018-11-6

在 MATLAB Online 中打开

whos displayWaveformLabels  %for variable checking
which  displayWaveformLabels  %for function checking

In command window might be the case there is no variable in the .mat file also it’s Not an inbuilt matlab function that’s why the error is occurring. if both returns not found then best is to download the toolbox as Stephen suggested.