From 5b3ea786c87d9a5dd82491b85f5934821da3f945 Mon Sep 17 00:00:00 2001 From: Sam Firke Date: Wed, 3 May 2017 08:42:10 -0400 Subject: [PATCH] typo: categorcal -> categorical (#524) --- model-basics.Rmd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/model-basics.Rmd b/model-basics.Rmd index 8e56623..5791adc 100644 --- a/model-basics.Rmd +++ b/model-basics.Rmd @@ -346,7 +346,7 @@ model_matrix(df, y ~ x1 + x2) This formula notation is sometimes called "Wilkinson-Rogers notation", and was initially described in _Symbolic Description of Factorial Models for Analysis of Variance_, by G. N. Wilkinson and C. E. Rogers . It's worth digging up and reading the original paper if you'd like to understand the full details of the modelling algebra. -The following sections expand on how this formula notation works for categorcal variables, interactions, and transformation. +The following sections expand on how this formula notation works for categorical variables, interactions, and transformation. ### Categorical variables