Accessing variables with functions in Matlab
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Suppose that I defined something in a .m file such as an initial velocity and I want to do a RK4 method to find numerical solutions for the velocity as time progresses. So, I define a function using the line: 'function RK4 = Runge_Kutta4()'.
In python, a function like this (e.g. RK4 = Runge_Kutta4()) would have access to the initial velocity, but could not change the variable. For my function to change the variable I would need to have the function call the variable using the line: 'RK4 = Runge_Kutta(Velocity)'. Is this true for Matlab as well?
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James Tursa
2018-3-13
编辑：James Tursa
2018-3-13
To have a function change a variable in MATLAB, one would typically do this:
x = myfunction(x);
And then the body of myfunction would change the value of x.
Another way is to use nested functions. E.g., if x is in a function and myfunction is a nested function within that first function, then myfunction could change x directly.
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