MATLAB: Illegal use of reserved keyword

app designermatlab gui

        function PLAYNOTE(app,frequency)
            FreqString=num2str(frequency);
            app.Label.Text=FreqString;
            %https://www.mathworks.com/help/signal/ug/edit-time-information-in-the-signal-analyzer-app.html
            %below details can be obtained from the above mentioned websites./
            SampleRate  = app.samplerate;
            TimeValue   = app.timevalue;
            TimeSamples  = 0:SampleRate:TimeValue;
            FORSINE=app.SINE.Value;
            FORSQUARE=app.SQUARE.Value;
            FORSAWTOOTH=app.SAWTOOTH.Value;
            if FORSINE == 1
                soundVector = sin(2*pi*frequency*TimeSamples);
             elseif FORSQUARE == 1
                soundVector = square(2*pi*frequency*TimeSamples);
             elseif FORSAWTOOTH == 1
                soundVector = sawtooth(2*pi*frequency*TimeSamples);
            end
            sound(soundVector, 1/SampleRate)
            CheckRecord=app.RECORD.Value;
            if CheckRecord == 1
                SOUNDCOMPOSE=app.Soundvector;
                if SOUNDCOMPOSE == 0
                    SOUNDCOMPOSE=soundVector;
                else
                    SOUNDCOMPOSE=cat(2,SOUNDCOMPOSE,soundVector);
                end
                app.Soundvector=SOUNDCOMPOSE;
            end
        end
    methods (Access = private)%showing error at this line....Illegal use of reserved keyword"methods"

Best Answer

This looks like a portion of an App Designer app, and if it is that is indeed a classdef file. Looking at the end keywords, the last one before the methods line ends the function. There is no end ending the previous methods block. You can't start a methods block inside another methods block.
end the methods block that contains PLAYNOTE before starting another one for your private methods.
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