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ANOVA Models in R - Part 3 (Alternative Parameterizations).mp4

In this video we continue our illustration of one-way ANOVA models in R through Example 11 in Mod13Script.R. You should open this script in RStudio and follow along while watching. In this…

From  Daniel Hall 509 plays 0  

Vectorized Computations.mp4

In R, loops are often not the most efficient way to do repetitive calculations. Rather than doing the calculations for each value of a variable it is much more efficient to organize the values of…

From  Daniel Hall 65 plays 0  

Conditional Execution - Part 1 (The ifelse() Function).mp4

The ifelse() function evaluates a logical object (usually a vector-valued logical condition) and returns an object of the same dimension with TRUE values replaced by a value, or vector of values,…

From  Daniel Hall 172 plays 0  

Combining Data Frames in R.mp4

This video covers how to combined data frames in R both horizontally and vertically. The primary tool for the former operation is the merge() function, whereas the rbind.fill() function from the plyr…

From  Daniel Hall 165 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  

Examples of List Input-Part 2

This video illustrates list input when an observation spans two or more lines on the input file. It also shows how SAS handles an invalid data value when reading data into a numeric variable.

From  Daniel Hall 197 plays 0  

2.1.3 Video: What is international relations?

This video explains the field of international affairs, including its sub-fields: international relations and comparative politics. It then proceeds to define international relations in greater…

From  Leah Carmichael 9 plays 0