legend id not showing my data

hello,

I'm trying to put a legend on my plot. I wrote the names I need but it doesnt show them, it shows "data 1" and "data 2".

  %% Timeseries HRF
    [voxRow, vocCol] = find(corrMat(:, :, slice_idx) == max(max(max(corrMat(:, :, slice_idx)))));
    voxTime = squeeze(M(voxRow, vocCol, slice_idx, :));
    figure()
    title ('HRF time series of a voxel with strong correlation from slice number #', num2str(slice_idx), 'FontSize', 10)
    hold on
    xlabel('Frame number');
    ylabel('Correlation');
    legend('voxel activity','stimuli', 'FontSize', 7);
    plot(1 : trails_N, mat2gray(voxTime)')
    hold on
    plot(1 : trails_N, hrfVec);

Answer 1

[KSSV]

Try this:

    figure()
    hold on
    title ('HRF time series of a voxel with strong correlation from slice number #', num2str(slice_idx), 'FontSize', 10)
    xlabel('Frame number');
    ylabel('Correlation');
    plot(1 : trails_N, mat2gray(voxTime)')
    plot(1 : trails_N, hrfVec);
    legend('voxel activity','stimuli', 'FontSize', 7);