How do i create a derivative plot?
I'm supposed to take reaction rates (slopes) from my graphs and enter in new
columns in the spreadsheet...i'm confused
thanks

You need to calculate the slopes somehow, or were you just going to eyeball
the? I've sometimes used a moving regression on the data. Say my X (or time)
and Y data were in A1:B100 and I wanted a 5-point moving average. I would
enter this formula in C3, and fill it down to C98:

=SLOPE(B3:B7,A3:A7)

The derivative plot would use columns A and C.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
http://PeltierTech.com
_______


"nickelndime" wrote in message
...
How do i create a derivative plot?
I'm supposed to take reaction rates (slopes) from my graphs and enter in
new
columns in the spreadsheet...i'm confused
thanks

Sounds like Chemistry!
How about using LINEST to get a polynomial fit (see
http://people.stfx.ca/bliengme/ExcelTips/Polynomial.htm)
Do a manual differentiation of this equation and use it to find the slope at
any point
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"nickelndime" wrote in message
...
How do i create a derivative plot?
I'm supposed to take reaction rates (slopes) from my graphs and enter in
new
columns in the spreadsheet...i'm confused
thanks