I forgot to also to say this parses a third order polynomial, would need to
adapt for other formulas.

Regards,
Peter T

"Peter T" <peter_t@discussions wrote in message
...
Look into Linest or better still various post by David Braden on the
subject.

If you particularly want to replicate your own trendline's formula you
could
try something like this - parses the formula of trendline(1) in series 1
to
a cell formula.

start by selecting a cell offset one to right of the first value you want
to
calculate

Sub GetFormula1()
Dim sFormula As String
Dim ser As Series
Dim tLine As Trendline
Dim cht As Chart, sNum As String
Set cht = ActiveSheet.ChartObjects(1).Chart
Set ser = cht.SeriesCollection(1)
If ser.Trendlines.Count = 1 Then
Set tLine = ser.Trendlines(1)
tLine.DisplayEquation = True
If tLine.DisplayEquation Then
sNum = tLine.DataLabel.NumberFormat
tLine.DataLabel.NumberFormat = "0.00000000000000E+00"
sFormula = tLine.DataLabel.Text
tLine.DataLabel.NumberFormat = sNum
sFormula = Application.Substitute(sFormula, _
"y = ", "")
sFormula = Application.Substitute(sFormula, _
"x", "*" & ActiveCell.Offset(0, -1).Address(0, 0) & "^")
sFormula = Application.Substitute(sFormula, _
"^ ", " ")
ActiveCell.Formula = "=" & sFormula
End If
End If
End Sub

In xl2K+ can use Replace iso Application.Substitute

In a long discussion last year it became clear that the formula is useless
without a high degree of precision.

Regards,
Peter T


wrote in message
oups.com...
Hi,

Based on a set of data, I've created a line pivot chart in Excel. I
have added a trendline, wich works perfectly! So, why this question?

Is it possible to get the specific values of a certain point on the
trendline? For example:


Pivot table:

[AverageUse]
Month Percentage
1 10,1234%
2 12,4678%
3 9,4373%

Now I've create a pivot chart (that's a bit difficult to reproduce with
ASCII-art;) and added a trendline, now I would like to see my pivot
table like this:

[AverageUse]
Month Percentage TrendlinePercentage
1 10,1234% 9%
2 12,4678% 13%
3 9,4373% 9%


Wich excel-guru has some briliant ideas?

Thanks in advance,

Best Regards,

Alain