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Can I pass arguments to a @callbackFcn?

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Javier Mateo
Javier Mateo on 29 Jul 2021
Commented: Javier Mateo on 30 Jul 2021
Hello,
I am reading some data from a serialport by using this function:
configureCallback(s,"terminator",@readSerialData)
The function looking like this
function readSerialData(s,~)
...
end
But how can I do to use arguments in the @readSerialData, for example I want to use this two arguments
function readSerialData(s,~,operation,mode)
...
end
How can I "pass" these two variables from the "configureCallback" line to the function?
Thank you!!
  1 Comment
Rik
Rik on 29 Jul 2021
For general advice and examples for how to create a GUI have look at this thread.

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Accepted Answer

J. Alex Lee
J. Alex Lee on 29 Jul 2021
configureCallback(s,"terminator",@(src,evnt)readSerialData(src,evnt,operation mode))
So the first parentheses specify the interface to the function handle you want to create, and the second parentheses is the interface to the actual function you want to make a handle of. The variables in the first parantheses must appear as-is in the list of the second parantheses; they are the special inputs. The rest of the variables in the list of the 2nd parantheses will just be "static".
A simpler example might be
mySpecificFn = @(x)myGeneralFn(x,1,2,3)
function y = myGeneralFn(x,a,b,c)
y = a*x.^2 + b*x + c;
end
which you can kind of glean from some examples in the documentation, but maybe it's not so clear that that is the same as
a = 1
b = 2
c = 3
mySpecificFn = @(x)myGeneralFn(x,a,b,c)
function y = myGeneralFn(x,a,b,c)
y = a*x.^2 + b*x + c;
end
  1 Comment
Javier Mateo
Javier Mateo on 30 Jul 2021
Excellent explanation. Thank you!!

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More Answers (1)

Bruno Luong
Bruno Luong on 29 Jul 2021
% Assuming operation,mode are defined
% operation = ...
% mode = ...
configureCallback(s,"terminator",@(s,t) readSerialData(s, t, operation, mode));

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