Handling external variables when redefining the text displayed by the data cursor

Hello everyone,

I would like to customize a matlab example defined to modify the text defined by the data cursor. The purpose is to make the data cursor dispay information that differs from its position.

The original scritp mainly looks like: fig= figure; dcm_obj = datacursormode(fig); set(dcm_obj,'UpdateFcn',@myupdatefcn)

My point is that I want to add input to the function handled by @myupdatefcn but I do not know how to call this input within the set command. Maybe it is trivial and I do not have the right keywords to check. Does someone have an idea? Many thanks in advance

Answer 1

[Jordy Jose]

hi Isabelle,

You may pass additional arguments like this:

val = 10;
set(dcm_obj,'UpdateFcn', {@myupdatefcn, val});

For more details regarding callback definitions, please refer to the link below:

https://www.mathworks.com/help/matlab/creating_plots/callback-definition.html

The function definition for myupdatefcn will look something like this:

function out = myupdatefcn(src, evt, val)
%your code here: val will be equal to 10
end