How can I vary a value in both the main script and a function file?

I have a system of 4 nonlinear ODE's which I have in a function file along with the parameters. One of which is the parameter 'K'.

The same parameter K is also in the main script. Both of these K's need to be the same for the script to run. If I have both equal to say K=0.198 I get sensible results

I'd like the value of K to increase from 0 to 0.2 in small steps (say 0.05) in the function but I also need the K value in the main script to change at exactly the same time.

Will I need to vary K in the function file and have the script call it in somehow from it?

Any help would be appreciated! I can provide the code but it's long and messy.

Thanks!

Calum

Answer 1

[Sean de Wolski]

You could create a simple handle class that has some value. Then pass the handle into the function and whenever the property is updated the new value will be accessible.

You could even have it notify listeners if you wanted so that the value gets updated completely automagically.

For example:

classdef K < handle
  properties
      value
  end
  methods
      function obj = K(val)
          obj.value = val;
      end
  end
end

Now

x = K(pi)

Pass x into the function.

Then if you set the value to something new, say:

x.value = exp(1)

Now you when you reference x.value, it will be upated:

y = x.value*pi;