Search for tag: "quiz"

Sorting in R.mp4

The sort() function will sort a vector in R in either ascending or descending order. But a more powerful and flexible technique is to sort data by using the order() function to generate subscripts…

From  Daniel Hall 247 plays 0  

Subscripts - Part 2 (Matrices & Arrays).mp4

In this video we continue to discuss subscripts, this time concentrating on matrices and arrays. Each dimension of these structures may be subscripted to return a sub-matrix or sub-array of the…

From  Daniel Hall 168 plays 0  

Data Structures in R - Part 4, Lists.mp4

We continue to discuss data structures in R, this time focusing on lists. Unlike vectors, matrices and arrays, the elements of a list may be of different modes. This makes them very flexible and…

From  Daniel Hall 90 plays 0  

Data Structures in R - Part 2, Matrices

We continue to discuss data structures in R, this time focusing on matrices. We cover how to form matrices with functions such as matrix(), cbind() and rbind(), and functions related to the…

From  Daniel Hall 146 plays 0  

Data Structures in R - Part 1, Vectors

In this video we introduce the various data structures in R, concentrating on vectors.Vectors are the fundamental unit in R, so it is important to understand how to form and manipulate them. While…

From  Daniel Hall 108 plays 0  

Introduction to R - Part 4 (An Example with Statistics and Plots)

This video presents an extended example from Mod8Script.R that deals with some fictitious quiz score data. Here we introduce several new functions for computing summary statistics and the t.test()…

From  Daniel Hall 220 plays 0  

IF-THEN-ELSE Statements in SAS

In this video we introduce the IF-THEN-ELSE statement, which can be useful in a SAS data step to execute code conditionally. Here we learn the basic syntax of the IF-THEN-ELSE statement, introduce…

From  Daniel Hall 782 plays 0