Curve fitting without using fitting box.

I want to make a curve fitting without using fitting box, and I want to use the model of Arctangent function. How can I do next?

Answer 1

[KSSV]

http://in.mathworks.com/matlabcentral/answers/91160-how-can-i-fit-my-data-to-an-inverse-tangent-function

The above link might help you...

[xiao zhang]

Sorry, I don't understand the answer you gave. I just have lots of inputs vector data y(1201,1) and x(1201,1) and I want to get the output of function coefficients of inverse tangent function.

[Walter Roberson]

Try the nlfit given at http://www.mathworks.com/matlabcentral/answers/91160-how-can-i-fit-my-data-to-an-inverse-tangent-function#answer_100570