|
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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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,…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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.
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|