how to give input for functions

function Y = myFunc(P,P0)

N = 2;

Pa = 9;

k = floor((P0*N/Pa));

Y = F(P)+k*F(N*P0-P*k);

function Fp = F(P)

R = 3;

beta = 8;

Fp = 1 - exp(-((2^R-1)./P).^(beta/2));

%Step 2: Minimize it within the bounds:

P0 = 9;

[Pi, FVal] = fminbnd(@(x) myFunc(x,P0),0,7);

getting error: Error using myFunc (line 4)

Not enough input arguments.

Answer 1

[Mischa Kim]

Hello Shobi, code looks fine. Make sure to save the two functions in one function file (called myFunc.m). Then execute the two final commands in the MATLAB command window:

P0 = 9;
[Pi, FVal] = fminbnd(@(x) myFunc(x,P0),0,7);

[shobi swaminathan]

which two functions.....

[Youssef Khmou]

hi, means the function called F is a subfunction of the main myFunc.

[Mischa Kim]

I mean, put

function Y = myFunc(P,P0)

N = 2;

Pa = 9;

k = floor((P0*N/Pa));

Y = F(P)+k*F(N*P0-P*k);

function Fp = F(P)

R = 3;

beta = 8;

Fp = 1 - exp(-((2^R-1)./P).^(beta/2));

in one function called myFunc.m.

[shobi swaminathan]

After saving the code as myFunc.m if we run then the following error is shown

Error using myFun (line 4) Not enough input arguments

[shobi swaminathan]

Then if we type

P0 = 7;

[Pi, FVal] = fminbnd(@(x) myFunc(x,P0),0,7); in the command window following error is shown

Maximum recursion limit of 500 reached. Use set(0,'RecursionLimit',N) to change the limit. Be aware that exceeding your available stack space can crash MATLAB and/or your computer. Error in myFunc>F

[Mischa Kim]

So it looks like it works (it works just fine on my machine). What MATLAB release are you working with?

What happens if you execute

[Pi, FVal] = fminbnd(@(x) myFunc(x,P0),0,1.1)

instead?

[shobi swaminathan]

I am using matlab version 2013

Again error

Undefined function 'bs' for input arguments of type 'double'. Error in @(x)bs(x,P0)

Error in fminbnd (line 216) x= xf; fx = funfcn(x,varargin{:});

[Mischa Kim]

Sorry that was a typo: bs is supposed to be myFunc. Fixed in the above comment.

[shobi swaminathan]

Thanks...we are getting the output....

But this code was taken from this website....

We are getting two values Pi and Fval Which one should we take it as minimum...what does Fval means

[Mischa Kim]

Pi is the x-value you are searching for, FVal is the function value that is minimized at x = Pi.

Answer 2

[shobi swaminathan]

Thanks alot.. in the above code the value of P and P0 are fixed.. but in our problem the value of P

 and P0 should be as follows

 P0 varies from 1 to 10 and
 P belongs to P1 such that   P1= [0, Pb]∪ ((N*P0)/(k+1)). how to modify the above code to satisfy 

 these conditions