equation fitting and plotting

I have 5 x axis values and 5 y axis values..

now i want to fit the equation

f(x)=a*(x^b - 2^b)

after that i have to plot the 5 data points which i did like plot(x,y)

now i have to plot my fitted function also on the same plot and it should be a smooth curve.

please help me..

Answer 1

[David Sanchez]

Did you consider the use of curve fitting tool?

cftool

On the command window, type:

doc cftool

You'll be given some examples similar to your problem.

[aditi]

hey david... no without using cftool

[David Sanchez]

the fitting function are part of the curve fitting tool. If you don't have it, you have to code the fitting algorithm yourself.

[aditi]

when i am using cftool it is fitting fine but giving totally wrong values of the parameters