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Chi-square Tests in R.mp4

Chi-square tests are useful for categorical data. They can be used to test whether a vector of probabilities associated with each of several possible outcomes is equal to some null value. That null…

From  Daniel Hall 199 plays 0  

Barcharts in R.mp4

Although plot() can produce bar charts, the barplot() function is often more convenient. In this video we introduce this function and illustrate its use to produce bar charts that display one and…

From  Daniel Hall 116 plays 0  

The plot() Function.mp4

The plot() function is the ultimate generic function in R. It is highly flexible, and produces a variety of different plot types depending upon the class of the objects that it operates on and the…

From  Daniel Hall 110 plays 0  

Creating Frequency Tables in R

Frequency distributions (univariate and joint) can be displayed in contingency tables, or cross-tabulations. In this video we show how tapply() can be used to create such tables, but we…

From  Daniel Hall 1,408 plays 0