Get plot lines title in a GUI plot by mouse click on each line

Hi! I am trying to incorporate a function or button in a GUI via GUIDE, so as to show me the tilte of each plotted line in a plot.

Namely, I am plotting various spectra (i.e. x,y data) and I would like to click on each line and get the title of the spectrum (see attached a picture)!

Could anyone provide me with a hint on how to do this?

Thank you in advance!

Answer 1

[Jan]

You can define a ButtonDownFcn for the lines:

LineH(1) = plot(1:10, rand(1, 10), 'r', 'DisplayName', 'Line 1');
LineH(2) = plot(1:10, rand(1, 10), 'b', 'DisplayName', 'Line 2');
TitleH = text(0.01, 0.01, '', 'Units', 'normalized', ...
    'VerticalAlignment', 'top');
LineH.ButtonDownFcn = {@showTitle, LineH, TitleH};  % [EDITED] Typo: "," -> "="

function showTitle(aLineH, EventData, LineH, TitleH)
TitleH.String    = aLineH.DisplayName;
LineH.LineWidth  = 0.5;
aLineH.LineWidth = 1.5;
uistack(aLineH, 'top');
end

[abaza]

Thank you so much Jan!!!

BUT: coud it be done without a loop??

Namely I plot matrices becasue I have large datasets: plot(X',Y')

Thank you!

[Jan]

My code does not contain a loop.

How are the names defined, you want to show as titles? If they are a cell string:

X = 1:10;
Y = rand(2, 10);
Name  = {'Line 1', 'Line 2'};
LineH = plot(X, Y);

% Set LineH(1).DisplayName to Name{1}, 
% LineH(2).DisplayName to Name{2} and so on:
set(LineH, {'DisplayName'}, Name(:));

TitleH = text(0.01, 0.01, '', 'Units', 'normalized', ...
    'VerticalAlignment', 'top');
LineH.ButtonDownFcn = {@showTitle, LineH, TitleH};

function showTitle(aLineH, EventData, LineH, TitleH)
TitleH.String    = aLineH.DisplayName;
LineH.LineWidth  = 0.5;
aLineH.LineWidth = 1.5;
uistack(aLineH, 'top');
end

[abaza]

YES EXACTLY!

Thank you so much!