How to use the mouse to select and identify a line on a plot
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Hi,
I have an analysis that I am performing repeatedly. There are two multi-channel data sources. These sources have different and possibly varying identification numbers. It is important that data source A and B are correctly identified.
I would like to be able to include a user interactive check where a channel from source A and B are plotted together. The user is then asked for instance to pick or highlight the line from data set A. This is then used to identify A and B. If necessary a swap of data sets is then performed prior to launching into the full analysis.
I am new to GUI programming and using callbacks etc in Matlab and would appreciate any comments or suggestions on this.
Regards
Andrew Sims
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Answers (2)
Jan
on 26 Jul 2013
Edited: Jan
on 26 Jul 2013
You can use the ButtonDownFcn of the line objects:
function smallTest
axes('NextPlot', 'add')
H(1) = plot(1:10, rand(1, 10), 'r');
H(2) = plot(1:10, rand(1, 10), 'b');
set(H, 'ButtonDownFcn', {@LineSelected, H})
function LineSelected(ObjectH, EventData, H)
set(ObjectH, 'LineWidth', 2.5);
set(H(H ~= ObjectH), 'LineWidth', 0.5);
12 Comments
Claus Andersson
on 24 Feb 2022
Jan, thanks for the very helpful solution above - is there a way to 'inline' this LineWidth change in the 'set' call to avoid having the function LineSelected.
I would like to have the figure stay interactive, even after the function has stopped running.
Jan
on 24 Feb 2022
I do not understand, what you are asking for.
You need to write the code of a callback into a function. Where do you want to "inline" it instead?
The figure does stay interactive. Which function stopped running?
Claus Andersson
on 24 Feb 2022
Hi Jan. My mistake. It works perfectly and the callback continues to work, I had a typo.
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