Convert graph to equatio (software)

[cindylky]

Hi. I'm new to this forum. I would like to ask is there any software that can convert graph to equation. My graph is in xy graph. I need to create a new accurate equation to make data more precisely. Appreciate to anyone who can help.

 

[Number Nine]

That's an intractable problem in general. You might try performing regression; any statistics software will do it for you (e.g. MATLAB, R).

 

[cindylky]

if i have a set of data that able to draw graph, can i apply the data to generate the equation?

 

[jhae2.718]

If you have the xy data you can fit a function to it. If you have MATLAB I'd use the Curve Fitting Toolbox, cftool. It offers a nice GUI showing the data set and the fit, and offers several basis functions to choose from.

 

[Andre]

If you don't have matlab, Microsoft Excel can also do some basic regressions/curve fitting.

 

[cindylky]

If you don't have matlab, Microsoft Excel can also do some basic regressions/curve fitting.

Btw, how to call that function out from microsoft excel after ploting the graph?

 

[jhae2.718]

There's a built-in Excel function that will give you the weights for a fitted basis function; I don't remember what it is.