Comments on: LOESS Smoothing in Excel

By: Jon Peltier

Jon Peltier — Sun, 26 Feb 2012 18:14:03 +0000

As the 8 Oct 2009 update to the article indicates, you should browse to

http://peltiertech.com/WordPress/loess-utility-awesome-update/

then download the add-in file at the link near the end of the article. Save the file, don’t try to run it from the link. Then use the instructions at the link near the add-in link to install the add-in in Excel.

By: Charles Vanya

Charles Vanya — Sun, 26 Feb 2012 06:26:37 +0000

How can download Loess smoothing tool for excel. I have been trying to download it but it is just displaying encrypted information. How can I get it?

Regards,

By: Jon Peltier

Jon Peltier — Tue, 13 Dec 2011 02:10:50 +0000

Oh, “legacy”… That can get tough.

I’m about to drop support for Microsoft’s legacy product, Excel 2003, even though it’s my favorite. It’s just too much effort to support two of everything, and users of 2001/2010 now far outnumber users of 2003.

By: Chad S.

Chad S. — Mon, 12 Dec 2011 21:59:14 +0000

Jon -

Many thanks for your quick reply!

By the way, it’s a legacy financial model, which uses a SAS-summarized dataset of aggregated monthly transaction records for a segment of accounts. Rows are metrics like deposits, withdrawals, account attrition, etc. ‘Month’ is in columns. So the dataset, model, and graphs show how the metrics have moved/will move over time.

By: Jon Peltier

Jon Peltier — Mon, 12 Dec 2011 20:40:18 +0000

Well, it's generally best practice to have data series in columns, since this is in accord with a database output's layout of fields in columns and records in rows. So my advice is to transpose your whole workbook. Of course, I don't know what you're doing and why it's arranged that way, I'm just generalizing. You might adjust the input ranges like this:

If TypeName(X) = "Range" Then 
  If X.Columns.Count > X.Rows.Count Then
    X = WorksheetFunction.Transpose(X.Value)
  Else
    X = X.Value 
  End If
End If

I have no plans to rewrite my add-in's code to handle horizontal ranges.

By: Chad S.

Chad S. — Mon, 12 Dec 2011 19:59:49 +0000

Does a version of the above LOESS function (VBA code) exist for HORIZONTAL array inputs?

I have a model with X, Y, and xDomain in rows rather than columns, and use intermediary TRANSPOSE functions as a workaround. However, it would be nice to have both a Horizontal and Vertical version of the LOESS function (similar to how VLOOKUP has the HLOOKUP counterpart). I tried modifying the code to work for Horizontal inputs, but apparently I don’t understand the code well enough to make it work.

Any advice?

Thanks, by the way, for this excellent info.