Curve fitting problem with X

Hi! I got this problem

Error using fit>iFit (line 127)
X must be a matrix with one or two columns.

Error in fit (line 108)
[fitobj, goodness, output, convmsg] = iFit( xdatain, ydatain, fittypeobj, ...

Error in dio (line 249)
f=fit(x,ls,'poly2');

and i can't understand what i'm doing wrong. X and lmabda_sky are:

lambda_sky=[6115,6145,6172,6385,6416,6605];
X=[3547,3546,3580,3703,3721,3831];

could you please help me??

Answer 1

[Walter Roberson]

Your arrays have one row, not one column

f=fit(x(:),ls,'poly2');

[chuenkiong]

Thank you,it really helped me

[Niklas Kurz]

Strange behaviour. Why the function doesn't accept row and columns inputs? Like the plot-function or basically any other function that does some array calculations.

[Torsten]

Strange behaviour. Why the function doesn't accept row and columns inputs? Like the plot-function or basically any other function that does some array calculations.

Because the number of columns for the first input argument is an indicator of whether curve fitting or surface fitting is to be performed. Read the documentation for "fit".