Undefined function 'mtimes' for input arguments of type 'function_handle'.

function [T,I]=fonk(f)

a=-1;

b=1;

y=@(x) f./sqrt(1-x.^2);

I=quad(f,a,b);

k=input('k yi giriniz...');

T=0;

for i=1:k

w=pi./k;

x=cos((2.*i-1).*pi./(2.*k));

h=f;

T=T+w*h;

end

fprintf(' T = %13.10f I= %9.2e\n',T,I)

end

Undefined function 'mtimes' for input arguments

of type 'function_handle'.

Error in fonk (line 12)

T=T+w*h;

what can i do to solve this error?

Answer 1

[Daniel Pollard]

Your function fonk takes f as an input. f must be a function handle in order to satisfy the quad requirements. Later, you set h=f and try to calculate w*h. h is a function handle, so this product doesn't make any sense, hence the error you got. In order to rectify this, you must make h be a number, not a function handle. Perhaps you could give the function its arguments, if its output is numeric.

[furkan öksüz]

ı input f and ı run this function. if ı dont use function and ı write this script manually its working. T=T+w*h have a problem in this function. Can ı solve it?

thanks for your answer

[Daniel Pollard]

I told you what the problem is and how you can solve it. I can't solve it because I don't know what the function is supposed to do. You need to either change the way it works, or give f an argument.

Answer 2

[Steven Lord]

You cannot multiply a number and a function handle or two function handles.

You can multiply a number and the result of evaluating a function handle or the results of evaluating two function handles.

f = @(x) x.^2;
g = @(x) x.^3;

thisWorks1 = 2*f(5)

thisWorks1 = 50

thisWorks2 = f(8)*g(4)

thisWorks2 = 4096

h = @(x) f(x)+g(x);
thisWorks3 = h(3)

thisWorks3 = 36

thisWillNotWork1 = 2*f

Operator '*' is not supported for operands of type 'function_handle'.

thisWillNotWork2 = f*g