January 2018
Beginner to intermediate
422 pages
9h 47m
English
Content preview from Regression Analysis with R
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Change datatype
In the previous section we noticed some anomalies in the dataset. But before proceeding with any removal, additional control over the type attributed by R to the variables should be carried out. To do this, we will use the str() function that returns a compact display of the internal structure of an R object:
str(SampleData)
The results are shown in the following:
> str(SampleData)'data.frame': 12 obs. of 5 variables: $ name : Factor w/ 12 levels "Ava","Elijah",..: 3 5 11 9 1 7 4 6 12 2 ... $ gender: Factor w/ 3 levels "","F","M": 2 3 1 3 2 3 2 3 2 3 ... $ age : int 24 -19 32 15 18 21 28 30 26 100 ... $ right : Factor w/ 11 levels "-19",".","13",..: 9 2 8 7 4 6 1 3 11 10 ... $ wrong : int 20 47 25 40 55 46 85 87 30 2 ...
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