fminsearch

Can anyone explain to me how I can apply non linear regression to this equation t find out K using the matlab command window. I = 10^-9(exp(38.68V/k)-1). Screenshot of Equation I have data values as follows: Voltage := [0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0]: Current:= [0, 0, 0, 0, 0, 0, 0, 0.07, 0.92, 12.02, 158.29]: Screenshot of Equation [NEW]: Now I used FminSearch as an alternative another and another error message appeared. Matrix dimensions must agree. Error in @(k)sum((I(:)-Imodel(V(:),k)).^2) Error in fminsearch (line 189) fv(:,1) = funfcn(x,varargin{:}); I used this

How can I pass a constant to fminsearch? So like, if I have a function: f(x,y,z), how can I do an fminsearch with a fixed value of x? fminsearch(@f, [0,0,0]); I know I can write a new function and do an fminsearch on it: function returnValue = f2(y, z) returnValue = f(5, y, z); ... fminsearch(@f2, [0,0]); My requirement, is I need to do this without defining a new function. Thanks!!! You can use anonymous functions: fminsearch(@(x) f(5,x) , [0,0]); Also you can use nested functions: function MainFunc() z = 1; res = fminsearch(@f2, [0,0]); function out = f2(x,y) out = f(x,y,z); end end You can