equalizerGUI();报错“该语句不在任何函数内。 (它在终止函数 "equalizerGUI" 定义的 END 之后。)”

抱歉，我之前的回答中遗漏了函数定义的部分。下面是完整的代码示例，包括函数定义部分：

function equalizerGUI()
    fig = uifigure('Name', '音频均衡器', 'Position', [100 100 800 600]);
    player = audioplayer([], []);
    freq1Slider = uislider(fig, 'Position', [50 500 200 3], 'ValueChangedFcn', @updateEQ);
    freq2Slider = uislider(fig, 'Position', [300 500 200 3], 'ValueChangedFcn', @updateEQ);
    freq3Slider = uislider(fig, 'Position', [550 500 200 3], 'ValueChangedFcn', @updateEQ);
    axesWaveform = uiaxes(fig, 'Position', [50 100 700 350]);
    axesSpectrum = uiaxes(fig, 'Position', [50 50 700 30]);
    openButton = uibutton(fig, 'Position', [50 450 100 30], 'Text', '打开文件', 'ButtonPushedFcn', @openFile);
    playButton = uibutton(fig, 'Position', [180 450 100 30], 'Text', '播放', 'ButtonPushedFcn', @playAudio);
    stopButton = uibutton(fig, 'Position', [310 450 100 30], 'Text', '停止', 'ButtonPushedFcn', @stopAudio);
    audioData = [];
    fs = [];

    function openFile(src, ~)
        [filename, filepath] = uigetfile({'*.wav;*.mp3;*.flac;*.ogg', '音频文件 (*.wav, *.mp3, *.flac, *.ogg)'}, '选择音频文件');
        
        if filename ~= 0
            [audioData, fs] = audioread(fullfile(filepath, filename));
            cla(axesWaveform);
            cla(axesSpectrum);
            freq1Slider.Limits = [0 2];
            freq1Slider.Value = 1;
            freq2Slider.Limits = [0 2];
            freq2Slider.Value = 1;
            freq3Slider.Limits = [0 2];
            freq3Slider.Value = 1;
            updateEQ();
        end
    end

    function playAudio(~, ~)
        if ~isempty(audioData)
            player = audioplayer(audioData, fs);
            play(player);
            
            while isplaying(player)
                currentPosition = player.CurrentSample;
                plot(axesWaveform, audioData(max(1, currentPosition-5000):currentPosition));
                axis(axesWaveform, 'tight');
                
                spectrum = abs(fft(audioData(max(1, currentPosition-5000):currentPosition)));
                plot(axesSpectrum, spectrum);
                axis(axesSpectrum, 'tight');
                
                pause(0.1);
            end
        end
    end

    function stopAudio(~, ~)
        stop(player);
    end

    function updateEQ(~, ~)
        if ~isempty(audioData)
            freq1Gain = freq1Slider.Value;
            freq2Gain = freq2Slider.Value;
            freq3Gain = freq3Slider.Value;
            
            equalizedAudio = audioData;
            equalizedAudio(:, 1) = equalizedAudio(:, 1) * freq1Gain;
            equalizedAudio(:, 2) = equalizedAudio(:, 2) * freq2Gain;
            equalizedAudio(:, 3) = equalizedAudio(:, 3) * freq3Gain;
            
            player = audioplayer(equalizedAudio, fs);
        end
    end
end

equalizerGUI();

请将上述代码保存为一个.m文件，并在MATLAB中运行该文件。这样就可以启动GUI界面，并使用均衡器功能进行音频处理。对于报错"该语句不在任何函数内"，这是因为整个代码需要包含在一个函数定义内，名为`equalizerGUI`。如果你已经将代码放在函数内，那可能是其他部分的拼接出现了问题，请确保代码的结构正确。