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In this video we conclude 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…
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This video features the first half of our coverage of Example 9 in Mod13Script.R. You should open this script in RStudio and follow along while watching. Here we show how to fit simple linear and…
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The ifelse() function and if-else statements can be used to evaluate one of two expressions or chunks of code depending upon a Boolean logical condition. However, these constructions must be chained…
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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…
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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()…
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In this video we continue with Example #7 from Mod7Examps.sas, in which we regress the city mpg on weight for 93 cars in the 1993 Consumer Reports Cars dataset. Here we consider a model that is…
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When setting a data set, the BY statement can be used to generate special variables known as the FIRST. and LAST. variables. These variables, which are only available in the program data vector, mark…
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PROC PRINT is a fairly simple procedure that you will use again and again. Learning its basic usage is easy, but this video also covers some additional topics like printing with BY groups; the SUM…
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This video introduces PROC SORT and some statements that are available and commonly used in many SAS PROCs. Such statements include BY, FORMAT, and WHERE.
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The RETAIN statement allows SAS to access the previous observation when processing the current observation. Given that SAS' built-in loop normally prevents such access, knowing the RETAIN…
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This video describes how SAS processes a data step. It is important to understand that SAS accesses one observation at a time and processes each observation in a temporary location called the program…
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