Sine trendline in scatter?

[Thora]

Hi,

I admit I'm not well versed with Excel 2007, but it doesn't appear that I
can add a sine trend line to my scatter point chart and I need to. Is there a
way to do this or perhaps an add-on that adds it to the trendline-type menu?

Thanks,
Thora

 

[Bernard Liengme]

You will need to do this using Solver
Send me (private email - just remove TRUENORTH.) a file with sample data and
tell me the form of the equation to be used in the fit (example: y=Asin(Bx)
where A and B are to be determined)

 

[Thora]

Hi,

Sorry I didn't see an email with caps to remove...so I thought it easiest
just to upload it externally. I hope that's okay. It's .xls

http://www.filedropper.com/sampledataneedssinetrend

The file contains two sets of data, the first is an obvious sine curve
trend, and the second sheet is a much less obvious sine trend (and the real
difficulty, as I can't freehand it). There are a few instances where there is
no data for Y; ignoring those should be fine, I should think.

As for the equation form...it's been so long since I've had to do any of
this... y=Asin(BX) is probably the best I can offer.

Thank you very mych for your assistance!

Thora

 

[Royi Avital]

What's "Solver"?

Thanks.
--
Royi Avital

You will need to do this using Solver
Send me (private email - just remove TRUENORTH.) a file with sample data and
tell me the form of the equation to be used in the fit (example: y=Asin(Bx)
where A and B are to be determined)
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
remove caps from email

 

[David Biddulph]

If Excel help isn't working on your machine, you may need to reinstall
Excel.

 

[Bernard Liengme]

If you look at this email you will see my address with TRUENORTH. added to
it
Or visit my website
I could not get the file from your site; also I need somewhere to send my
reply file
best wishes