Hello,

need help.

I created trendlines in excel using polynomial curves. They look pretty
good, but the equations supplied are way off. Can somebody help me.
Using a second order poly gave the best results but still way off.

thanks.


--
jlsexcel
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jlsexcel -

Perhaps you need to display more significant digits. One way is to click the
trendline equation to select it and then press the Increase Decimal button
repeatedly.

- Mike
www.mikemiddleton.com

"jlsexcel" wrote in
message ...
Hello,
need help.
I created trendlines in excel using polynomial curves. They look pretty
good, but the equations supplied are way off. Can somebody help me.
Using a second order poly gave the best results but still way off.
thanks.
--
jlsexcel
------------------------------------------------------------------------
jlsexcel's Profile:
http://www.excelforum.com/member.php...o&userid=30169
View this thread: http://www.excelforum.com/showthread...hreadid=498527

see my Excel Tips on the use of LINEST for polynomial fit
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"jlsexcel" wrote in
message ...

Hello,

need help.

I created trendlines in excel using polynomial curves. They look pretty
good, but the equations supplied are way off. Can somebody help me.
Using a second order poly gave the best results but still way off.

thanks.


--
jlsexcel
------------------------------------------------------------------------
jlsexcel's Profile:
http://www.excelforum.com/member.php...o&userid=30169
View this thread: http://www.excelforum.com/showthread...hreadid=498527

You can only fit a polynomial trendline to an X-Y scattergraph. They really
should incorporate an error message when you try to fit it to any other type
of graph. Hope this helps.

P. Williams

"jlsexcel" wrote:


Hello,

need help.

I created trendlines in excel using polynomial curves. They look pretty
good, but the equations supplied are way off. Can somebody help me.
Using a second order poly gave the best results but still way off.

thanks.


--
jlsexcel
------------------------------------------------------------------------
jlsexcel's Profile: http://www.excelforum.com/member.php...o&userid=30169
View this thread: http://www.excelforum.com/showthread...hreadid=498527

Where is original message?
To the OP: you need to format the trendline to display more digits; or use
LINEST to put the values into cells -
http://www.stfx.ca/people/bliengme/E...Polynomial.htm
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email


"P Williams" <P wrote in message
...
You can only fit a polynomial trendline to an X-Y scattergraph. They
really
should incorporate an error message when you try to fit it to any other
type
of graph. Hope this helps.

P. Williams

"jlsexcel" wrote:


Hello,

need help.

I created trendlines in excel using polynomial curves. They look pretty
good, but the equations supplied are way off. Can somebody help me.
Using a second order poly gave the best results but still way off.

thanks.


--
jlsexcel
------------------------------------------------------------------------
jlsexcel's Profile:
http://www.excelforum.com/member.php...o&userid=30169
View this thread:
http://www.excelforum.com/showthread...hreadid=498527