Hi Jerry,

Hope you re haing a good day. I appreciate your taking a look this problem.
Tom has helped a lot in trying to solve this and a funtion called Teveval()
has come the closest to doing it. Thanks again.

"Jerry W. Lewis" wrote:

A 6th order polynomial is likely to be very ill-conditioned, with the
result that I would not be surprised if LINEST coefficients for pre-2003
Excel versions failed to match those produced by the chart trendline
(which is surprisingly good numerically). However the TREND() worksheet
function might still produce reasonable results.

To use the coefficients from the chart trendline, you must right click
on the equation displayed on the chart, and format to scientific
notation with 14 decimal places.

How many data points do you have? Is it feasible to list all the data
in the body of a reply (not an attachment, please)

Jerry

David wrote:

Hi Group,
This is a little difficult to explain, but the underlying data is simple, so
please bear with me. I have Dates and Closings for the Dow Jones Industrial.
Similar to below:
Date Adj. Close*
01/03/05 10729.43
12/27/04 10776.13
12/20/04 10661.6
12/13/04 10638.32
............More Data

The above is easy to graph and I have automated the process, which includes
a 6th Order Polynomial Trend line added to the graph. What I am trying to do
is find the Data Points associated with the 6th Order Polynomial Trend line.
It has simply been just too long since I have done this type of statistics. I
believe it may be necessary to create a new table to find these data points,
which I am willing to do. I can calculate the sample mean, number of sample
variables, sample variance, sample standard deviation, etc., but it has just
been too many years to bring the necessary statistical expertise to arrive at
the data points. I am trying to get a table that looks something like this:
Date Adj. Close* Trend
01/03/05 10729.43 10730.25
12/27/04 10776.13 10750.31
12/20/04 10661.6 10765.03
12/13/04 10638.32 10750.00
I have tried using some of the built in functions, but they do not yield the
same data points that have been graphed by the 6th Order Polynomial Trend
line. I have tried Trend and Forecast. I created a table many years ago,
which I think calculated the data points, but it has simply been to many
years and I have lost the statistical expertise. Any help would be greatly
appreciated. I have used the equation that can be presented with the graph,
but it also does not yield the Data Points associated with each Date and Adj
Close.
Thanks in advance.