Select a multipe lines in a plot and store each lines XData and YData in an array

I'm plotting a lot of map data and I want to be able to select multiple lines to create a route by storing the X and Y co-ordinates.

I have found the following function that allows a user to select each line and then make it thicker, etc.

I've tried to modify the second function by adding

Var = num2str(h(1).XData)

but to no avail.

Does anyone know how I can implement this?

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);

Answer 1

[KSSV]

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})
end

function LineSelected(ObjectH, EventData, H)
  set(ObjectH, 'LineWidth', 2.5) 
  set(H(H ~= ObjectH), 'LineWidth', 0.5) ;
  % Get x and y data of the highlighted lines 
  x = ObjectH.XData 
  y = ObjectH.YData 

end

[Thomas]

Hi thank you for your answer.

Is it possible to save the variables, and when one line is selected that data is stored and then another line can be selected and that data strored too and so on.

I've tried to implement this, with a loop for i and save x(i,:) but it falls over as it is in a function.

Do I need to implement the loop and save feature outside the function?

[KSSV]

You save the variables to a file...

[Adam]

Use a nested function for the callback and define the variables you want to store into in the main function.

[Trang Luu]

Sorry can you please explain a bit more?

I was able to add the following lines of code to save my X and Y values to my workspace, but every time I select another line on my plot, the variable would update. I would like the variable to just be added to instead of constantly replaced.

function LineSelected(ObjectH, EventData, H)
  set(ObjectH, 'LineWidth', 2.5) 
  set(H(H ~= ObjectH), 'LineWidth', 0.5) ;
  % Get x and y data of the highlighted lines 
  x = ObjectH.XData 
  y = ObjectH.YData 
  assignin('base','XinWorkSpace',x); 
  assignin('base','YinWorkSpace',y); 
end