Creating a formula from plot points

[Little_grim]

Hallo all...

I have a couple of plot values that I am trying to derive a formula from. The points are almost linear but not quite...

Was hoping someone could shed some light on how to go about this...
I have Matlab 7.1, would like to use it if at all possible...

Any help would be appreciated.

 

[Simon Bridge]

Welcome to PF;
Turning a plot into an equation is called regression analysis.
You have to start out with a good idea of what the underlying equation should be before you start.

If you only have two points, then you can only plot a line - I'm guessing you mean you have a couple of datasets that, when you graph them, make something that looks like it's trying to be a line.

The MATLAB function you want will be: polyfit
... you want to find the line y=mx+c that best fits the data.