What type of line does the "smooth" line plot with Scatr??

Kaim · Post by **Kaim** » Sat Nov 12, 2022 3:54 pm

I'm looking to know what type of fitted line the "smooth" line is when one makes a scatterplot in Scatr. It seems to be a Loess regression, but does not specify. Hope someone can clarify

MAgojam · Post by **MAgojam** » Sat Nov 12, 2022 7:05 pm

Hey Kaim,
I saw you asked Ravi this question on GitHub as well.

You were already there and didn't think about taking a look at the code.
Do it now:
https://github.com/raviselker/scatr/blo ... .R#L57-L58

As you can see, there is a function call ggplot2::geom_smooth(), with the method to use.
Which method it will use can be found a few lines above (row: 41).
Having chosen the Smooth option for "Regression Line", the method will be 'auto'.
This results in the loess method and formula.
If the messages weren't purposely suppressed (row: 43), there would be a message like this

Code: Select all

`geom_smooth()` using method = 'loess' and formula 'y ~ x'

Cheers,
Maurizio

Kaim · Post by **Kaim** » Sat Nov 12, 2022 7:43 pm

Salve Maurizio,

Grazie tanto per la riposta. I thought to ask here too since there didn't seem to be much activity on Ravi's Github page. Thanks very much for the clear explanation to someone new to Jamovi!

Best,
Kai

jamovi