geom smooth what are the methods available

Question

I m using geom smooth   from ggplot2   In Hadley Wickham s book   ggplot2 - Elegant Graphics for Data Analysis   there is an example  page 51   where method  lm  is used  In the online manual there is no talk of the method argument  I see other Google results  and questions here  of people using method  loess    Is there a an exhaustive list somewhere that explains the options   From what I can see   lm  draws a straight line  and  loess  draws a very smooth curve  I assume there are others that draw more of a jagged line between reference points   The se argument from the example also isn t in the help or online documentation   FWIW here is my code   p  lt - ggplot output8  aes age  myoutcome  group id  colour year diag cat2       geom line     scale y continuous limits   c lwr upr   p   geom smooth aes group year diag cat2   method  loess   size 2  se F

User · Accepted Answer

Sometimes it s asking the question that makes the answer jump out  The methods and extra arguments are listed on the ggplot2 wiki stat smooth page    Which is alluded to on the geom smooth   page with       See stat smooth for examples of using built in model fitting if you   need some more flexible  this example shows you how to plot the fits   from any model of your choosing     It s not the first time I ve seen arguments in examples for ggplot graphs that aren t specifically in the function  It does make it tough to work out the scope of each function  or maybe I am yet to stumble upon a magic explicit list that says what will and will not work within each function

User · Answer

The method argument specifies the parameter of the smooth statistic  You can see stat smooth for the list of all possible arguments to the method argument

User · Answer

The se argument from the example also isn t in the help or online documentation   When  se  in geom smooth is set  FALSE   the error shading region is not visible

[r] geom_smooth() what are the methods available?

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