How do i find the equation of this graph?

• Jun 4th 2010, 02:08 PM
shawnz1102
How do i find the equation of this graph?
Hi everyone, I have a graph here but it's in increments of X=0.25 and Y=25 I'd like to change mimic this graph and change the increments to X=0.5 and Y=25 but I'm not sure what the equation is...

For all the math experts here, does anyone know how to find the equation just by looking at the graph? It's a "dyno sheet" of a car.

http://i184.photobucket.com/albums/x...g?t=1275677582
• Jun 4th 2010, 04:04 PM
Mush
Quote:

Originally Posted by shawnz1102
Hi everyone, I have a graph here but it's in increments of X=0.25 and Y=25 I'd like to change mimic this graph and change the increments to X=0.5 and Y=25 but I'm not sure what the equation is...

For all the math experts here, does anyone know how to find the equation just by looking at the graph? It's a "dyno sheet" of a car.

http://i184.photobucket.com/albums/x...g?t=1275677582

This equation will not have a closed form expression which describes it.

The data here is obtained discretely, and must be analysed discretely (using numerical methods).

Although it could not doubt be approximated by a piecewise function of polynomial interpolations.
• Jun 4th 2010, 09:34 PM
integral
I don't know anything about analysis, but if I was desperate to find an equation for such a graph.

I would slip it up into tiny intervals

Then look at each interval and find the equation of a "best fit" line.

Once all the equations have been obtained, place it into a peace wise function.