Difference between Interpolation (griddata) and linearintep (fit)

I am working on a surface fitting and came across these two inperpolation methods. I can use 'griddata' which is working very nicely and recently i got to know about the fact that 'fit' function can also interpolate. Now what is the difference between these two techniques? Are they same or there is some difference?

[KSSV]

YOu use both the functions.......and compare the out puts withoriginal data......and you can see which is performing better.

[Mohan Gopal Tripathi]

Thank You. I have one more question regarding it. Does they use same algorithm or different?

[Bjorn Gustavsson]

Read the help-documentation!

helpwin griddata
helpwin fit

The first-level (and most likely second-level) information is there, also links to more detailed documentation.

HTH