Input argument "flag" is undefined.

[EDIT: 20110610 00:29 CDT - reformat - WDR]

Hi, I,m trying to use this function but I get this error:

"Input argument "flag" is undefined".

Please help me...

function [out1,out2,out3]=func(flag,s,x,e,alpha,beta,gamma);
switch flag
    case 'b';
        out1=zeros(size(s));
        out2=s;
    case 'f';
        out1=((s-x).^(1-alpha))/(1-alpha);
        out2=-(s-x).^(-alpha);
        out3=-alpha*(s-x).^(-alpha-1);
    case 'g';
        out1=gamma*x+e.*x.^beta;
        out2=gamma+beta*e.*x.^(beta-1);
        out3=(beta-1)*beta*e.*x.^(beta-2);
end

Answer 1

[Oleg Komarov]

For those who can't read your function:

function [out1,out2,out3]=func(flag,s,x,e,alpha,beta,gamma)

switch flag 
    case 'b'; 
        out1=zeros(size(s)); 
        out2=s; 
    case 'f'; 
        out1=((s-x).^(1-alpha))/(1-alpha); 
        out2=-(s-x).^(-alpha); 
        out3=-alpha*(s-x).^(-alpha-1); 
    case 'g'; out1=gamma*x+e.*x.^beta; 
        out2=gamma+beta*e.*x.^(beta-1); 
        out3=(beta-1)*beta*e.*x.^(beta-2); 
end

If you call it w/o supplying any arguments that's the exact error you get, i.e. it won't work if you don't say what "flag,s,x,e,alpha,beta,gamma" are:

>> func
??? Input argument "flag" is undefined.

Error in ==> func at 3
switch flag

You should call it with the necessary arguments, in the case of flag = 'b':

>> func('b',1)

ans =

       0

Hope it's clear.

Oleg

Answer 2

[Julia]

I'm having a similar problem with this code, it gives the error "Input argument "x" is undefined.

Error in ==> Circulator at 11 Stationary=x;"

Can you help?

function [Correlation,shift] = Circulator(x,z) %Finds relative amp of x and z for circle data

Stationary=x; Moving=z;

kk=1; Correlation=[]; m=17; for n=0:.1:1 Correlation(kk,1)=Stationary(m,1)*Moving(m+n,1); kk=kk+1; end shift=max(Correlation);

end

[Friedrich]

Sounds like you are calling Circulator(x,y) as Circulator(). So please pass arguments to your function Circulator.