Added some points from written notes to README

README.md

@@ -263,3 +263,26 @@ See `questions_number-of-cards.R` for details.
 * @vanderAalst2016 [Chap. 5, x]
 * @Wang2019
 
+# Open stuff
+
+* Angle from which people approach table in Braunschweig? Consider in
+  rotation variable?
+* Time limit for `case` variable different for different events? (openTopic
+  should be opened the longest)
+  --> I think this is not relevant since I am looking at time *between*
+      events!
+
+# Stuff AK found interesting
+
+* Pre/post corona
+* Identify school classes
+* How many persons are present at the table?
+
+# Other potential questions
+
+* "Bursts"
+* 1st vs. 2nd half of the day
+* Can we identify "types of art"? With clustering or something?
+* Possible to estimate how many persons per day? Maybe average of certain
+  weekdays? ... ?
+

code/02_preprocessing.R

@@ -78,6 +78,10 @@ trans_wide <- reshape(dat1, direction = "wide",
                       timevar = "time",
                       drop = c("popup", "card", "event")
 )
+
+# TODO: Should `card` remain? Or maybe rather topic?
+# --> Rethink when you add topics, maybe card -> topicNumber?
+
 # TODO: This runs for quite some time
 # --> Is this more efficient with tidyr::pivot_wider?