Can I use the function of Savitzky–Golay filter in DataGraph?

[hans0504Participant]

https://en.wikipedia.org/wiki/Savitzky–Golay_filter

[dgteamModerator]

We have LOESS smoothing, which is a related technique.

https://community.visualdatatools.com/datagraph/knowledge-base/command-fit/#loess

Here is an article describing these methods that I thought might be helpful.

https://core.ac.uk/download/pdf/18605558.pdf

Will the LOESS approach work for your data?

 

[hans0504Participant]

Dear DGTeam,

Thanks. I have another question, how can I shift the line to the left, like in the command of “Plot->Plot offset->change the x or y value”?

Thanks again!

[dgteamModerator]

The other commands do have the offset like the Plot command, but you can use an Expression column to generate the needed data.

For example, if you have an x and y column and you want to offset x, you can enter this expression, where offset is a number variable, like a Slider.  You can also type in a value for the offset directly, but using a variable makes it easy to change or base on the offset on a derived value.

Here is the LOESS example we have in the example files with an offset applied.  The values with and without the offset are shown.

Does this help?

[hans0504Participant]

Dear DG Team,

Thank you so much for your quickly and helpful support! It works now.

Best regards

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