Not enough input arguments in lsqcurvefit function

xdata is 744x1 double vector

ydata is 744x1 double vector

function consists of

function ydata=calcor(k,xdata)
ydata=1-(1-k)*(xdata.^k);
end 

x0=[0 0]

lsqcurvefit is written like below

k= lsqcurvefit(calcor,x0,xdata,ydata);

it keeps giving me not enough input argument error.

Not enough input arguments.

Error in calcor (line 2)

Answer 1

[Torsten]

x0 = 0 

not

x0 = [0 0]

since k seems to be a scalar as you treat it in "calcor".

Further I guess

k= lsqcurvefit(@calcor,x0,xdata,ydata);

instead of

k= lsqcurvefit(calcor,x0,xdata,ydata);

[Batula]

Thanks for helping

@calcor helped however it is giving me another error message. Could you please check it?

[Torsten]

Could you please check it?

I will, but where is it ?