Error using lsqcurvefit: Function value and YDATA sizes are not equal.

I am trying to use the lsqcurvefit function to fit a sine wave to a data set, however i get the following error:

Function value and YDATA sizes are not equal.

when running the following code:

A = 0.3;
omega = 1;
phi = 0.1;
c = 0.1;

constants = [A omega phi c];

fun = @(timearray,constants) A .* (sin((timearray .* omega) + phi)) + c;

fittedconstants = lsqcurvefit(fun,constants,timearray,anglearray);

plot(timearray,fun(timearray,fittedconstants));

The array "timearray" is a 1x10001 double, defined by:

timearray = 0:0.01:100;

and the "anglearray" is also a 1x1001 double, filled with experimental data.

I feel as if it may be due to the mathematical operators used in my function, I have tried removing the "." before the "*" but this doesn't seem to work. placing a "." before and after the "sin" operator yields more errors.

Cheers in advance, I hope the information given is enough for a solution.

[Max De Chastelain]

Checking the size of "fun" and "anglearray" yields the following:

>> size(fun)

ans =

     1     1

>> size(anglearray)

ans =

           1       10001

I am unsure as to how to get the size of "fun" to be a 1x10001 double.

Answer 1

[Matt J]

A = 0.3;
omega = 1;
phi = 0.1;
c = 0.1;

initialGuess = [A omega phi c];

fun = @(x,timearray) x(1) .* (sin((timearray .* x(2)) + x(3))) + x(4);

fittedconstants = lsqcurvefit(fun,initialGuess,timearray(:).',anglearray(:).');

plot(timearray,fun(fittedconstants, timearray));