Continuing to rewrite data-transform

_bookdown.yml

@@ -12,6 +12,7 @@ rmd_files: [
   "workflow-basics.Rmd",
   "data-transform.Rmd",
   "data-tidy.Rmd",
+  "workflow-pipes.Rmd",
   "data-import.Rmd",
   "workflow-scripts.Rmd",
   "EDA.Rmd",

logicals-numbers.Rmd

@@ -225,4 +225,3 @@ near(1 / 49 * 49, 1)
 
 1.  What trigonometric functions does R provide?
 2.  
-

missing-values.Rmd

@@ -6,6 +6,14 @@
 library(tidyverse)
 ```
 
+Missing topics:
+
+-   Missing values generated from matching data frames (i.e. `left_join()` and `anti_join()`
+
+-   Last observation carried forward and `tidy::fill()`
+
+-   `coalesce()` and `na_if()`
+
 ## Basics
 
 ### Missing values {#missing-values-filter}
@@ -167,7 +175,3 @@ arrange(df, desc(x))
 ## Exercises
 
 1.  Why is `NA ^ 0` not missing? Why is `NA | TRUE` not missing? Why is `FALSE & NA` not missing? Can you figure out the general rule? (`NA * 0` is a tricky counterexample!)
-
-### Missing matches
-
-Discuss `anti_join()`

strings.Rmd

@@ -191,6 +191,8 @@ str_sort(x, locale = "en")  # English
 str_sort(x, locale = "haw") # Hawaiian
 ```
 
+TODO: add connection to `arrange()`
+
 ### Exercises
 
 1.  In code that doesn't use stringr, you'll often see `paste()` and `paste0()`.

vector-tools.Rmd

@@ -172,4 +172,3 @@ You can learn more about useful window functions in the corresponding vignette:
     Use that information to rank the carriers.
 
 8.  
-

workflow-pipes.Rmd

@@ -0,0 +1,28 @@
+# Workflow: pipes {#workflow-pipes}
+
+-   Indenting and line breaks
+
+    ```{r, eval = FALSE}
+    df %>% mutate(y = x + 1)
+    # vs
+    df %>%
+      mutate(
+        y = x + 1
+      )
+    ```
+
+-   `mutate(df, y = x + 1)` vs `df %>% mutate(df, y = x + 1)`
+
+-   with ggplot2
+
+    ```{r, eval = FALSE}
+    df %>% 
+      ggplot(aes()) 
+    ```
+
+    Don't forget to switch to plus!
+
+-   How long should your pipes be?
+    Too long vs too short
+
+-   Restyling with style.