MATLAB: Subtracting two function handles

function handlesnested functionssubfunctions

I was wondering how I could subtract values from two anonymous functions to yield a new function handle. for example:

f = @sin
g = @cos

and I want to define

h = f – g, such that h = @(sin – cos)

Best Answer

 h=@(x) f(x)-g(x);

Related Solutions

MATLAB: Use a function handle inside another function handle

You're missing one small piece in your definition of z. You can't multiply a function handle and a numeric value, but you can multiply the numeric value obtained by evaluating that function handle and a numeric value.

 f = @cos;
 y = @(x) f(x);
 z = @(x) y(x).*sin(x); % Note y(x) instead of y

To test, compare evaluating the function using the function handle and evaluating the function normally, by calling COS and SIN:

 v = 0:0.1:2*pi;
 usingFH = z(v);
 usingFun = cos(v).*sin(v);
 isequal(usingFH, usingFun)

That last statement will return true.

MATLAB: Handles.

It depends on how it was defined:

handles.num = 15

Now "handles" is a struct containing the field "num", which has the value 15. But if your define "handles" as object, it could be something different.

So please take the time to investigate it yourself:

class(handles)
whos('handles')
methods(handles)

If I dare to guess, "handles = guidata(FigureHandle)" might be the creator of the struct "handles". If so, see "help guidata" for more details.

Best Answer

Related Solutions

MATLAB: Use a function handle inside another function handle

MATLAB: Handles.

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