function that connects points

Hi,

I have points x and their corresponding value f (x).

can be extracted from the plot of x and f (x) the function that connects the points?

Thank you

Answer 1

[Image Analyst]

I think Walter has your answer:

http://www.mathworks.com/matlabcentral/answers/32527-convert-plotted-figure-into-excel

[Valerio Matteucci]

I forgot an "have" in the question, sorry.

The problem is that i have the data, but i need the continuous function that connects those points.