Undefined function or variable

Hey there,

I'm pretty new to Matlab, but need to use it for some simple calculations. However, I can't seem to make my function work in any way. I've tried several approaches, but nothing seems to get me to where I want.

I'm trying to calculate a coil constant, I need this to be a function, so that I can change all parameters for later use. I seem to have difficulties with the defintion of the function and variables and get the error message " Undefined function or variable ".

I'm not quite sure what to do, and any help would be greatly appreciated.

function s=spolekonstant2(F_n, F_p, F_m, str)
%Formula to find coil constant
%inputs
%   F_n is baseline
%   F_m is negativ
%   str is I, in ampere 
% output
%      s= coil constant
s = sqrt(((F_p)^2+(F_m)^(2)-2*(F_n)^2)/2*(str)^2);
F_p = 47.925;
F_m = 60.086;
F_n = 50.163; 
end

Answer 1

[Raul Andres Lopez Romero]

Mira, if you try to make this function that way it does not work, all because the parameters yo use in this function at the end always change, try this: you already create the function like this:

function s=spolekonstant2(F_n, F_p, F_m, str)
%Formula to find coil constant
%inputs
%   F_n is baseline
%   F_m is negativ
%   str is I, in ampere 
% output
%      s= coil constant
s = sqrt(((F_p)^2+(F_m)^(2)-2*(F_n)^2)/2*(str)^2);
end

So, the only thing you need to do is call the function and fill with the parameters you need,

   F_p = 47.925;
    F_m = 60.086;
    F_n = 50.163; 
    str=89;
    Result=spolekonstant2(F_n,F_p,F_m,str) %this is the way you call the function