Select lines on a surf plot and output indices
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I have a plot (spectrogram) on which I added some lines. I would like to select some of these lines directly on the plot with the mouse and output the index of each selected line.
Here is part of my script for the plot
figure
hold on
H(1) = surf(t,f,20*log10(abs(s)),'EdgeColor', 'none');
axis xy; axis tight;
colormap(jet); view(0,90);
xlabel('Time (secs)');
colorbar;
ylabel('Frequency(Hz)');
% Add lines
ipt_sec = t(ipt); % Indices to seconds
for i = 1:numel(ipt_sec)
y = ylim;
H(i)= plot([ipt_sec(i),ipt_sec(i)],[y(1) y(2)], 'LineWidth', 2, 'Color', 'k');
end
set(H, 'ButtonDownFcn', {@LineSelected, H})
function LineSelected(ObjectH, EventData, H)
set(ObjectH, 'LineWidth', 4);
set(H(H ~= ObjectH), 'LineWidth', 2);
end
I would like to be able to select multiple lines (instead of just one in the script above) and output each of their index.
Any help greatly appreciated, thank you!
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답변 (1개)
KSSV
2021년 11월 16일
편집: KSSV
2021년 11월 16일
Just use
surf(20*log10(abs(s)),'EdgeColor', 'k')
Use getpts or ginput or daatip, this will give you location/ index where you have clicked on the plot. It has (i,j) r (row,column). Now you can use t(r,:) or t(:c) etc.
But why you want to click on the plot? You can use ==, <=, >= etc to get what you want.
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