How can I fit a curve on two sets of data simultaneously?

Hi there,

I have two different curves (sinusoidal functions with the same frequencies) in one period of time. I want to find the best curve which can represent both of the reference curves. I want to know is there any method in MATLAB that using it I can fit a curve on that two sets of data simultaneously?

Thank you,

[Torsten]

What is the equation of the function to which you want to fit both sinusoidal curves ?

[Mitra Taghizadeh]

@Torsten

F1(t)=a11*sin(b11(t)+c11)+a21*sin(b21(t)+c21)+a31*sin(b31(t)+c31)

F2(t)=a12*sin(b12(t)+c12)+a22*sin(b22(t)+c22)+a32*sin(b32(t)+c32)

where: b11=b12

b21=b22

b31=b32

Answer 1

[Walter Roberson]

Append the data together.

joint_x = [x1; x2];
joint_y = [y1; y2];
cftool(joint_x, joint_y)

[Mitra Taghizadeh]

@Walter Roberson

Thank you so much it is working.