Vectors: subsetting rules are not explained, not by index, not by logical vectors.
"Intro to R" starts with example script(which is missing). I am assuming that the script includes concepts that will be explained during this lesson: objects, functions, vectors, subsetting? $ operator is mentioned in script description, but is not used in the lesson. If there is $, there should be lists or data frames, but none are described in the lesson. If this is intro to R, it would be useful to go through 1)objects +functions, 2) data types, 3)data structures, 4)subsetting rules to get ready for the next section. But it is not clear how much time is allocated to this (or any other lesson) so not sure how much was intended to be covered here.
Vectors: subsetting rules are not explained, not by index, not by logical vectors.
"Intro to R" starts with example script(which is missing). I am assuming that the script includes concepts that will be explained during this lesson: objects, functions, vectors, subsetting? $ operator is mentioned in script description, but is not used in the lesson. If there is $, there should be lists or data frames, but none are described in the lesson. If this is intro to R, it would be useful to go through 1)objects +functions, 2) data types, 3)data structures, 4)subsetting rules to get ready for the next section. But it is not clear how much time is allocated to this (or any other lesson) so not sure how much was intended to be covered here.