In Module 13 we cover the implementation of basic statistical methods in R. We begin with a discussion of some functions to compute summary statistics and to characterize univariate distributions. In…
While tapply() applies a function to different observations in a vector, which might correspond to rows in a data frame, lapply() and sapply() apply a function to each element of a list. In the case…
The scatter plot is a fundamental tool for visualizing the relationship between two quantitative variables. In this video we show how to use PROC SGPLOT to produce scatter plots and demonstrate how…
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.