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In this video we will learn how to import data into R, one of the most widely-used actions in R (read.table, read.delim).

The general-purpose data reading function in R is the read.data() function. To load data in the form of a text file from your working directory, pass the name of the file in quotes, and then specify at least the following: what the separator for your data is (so, how R is to know what distinguishes variables); does your data set have a header row or not; should R encode your string variables as factors.

Separators tell R how to look at your data and how to structure the data frame. The header signals whether the first row of the data file is values or variable names. If your data doesn’t have variable names and begins directly with the first observation, then set that argument to FALSE. Finally, the stringsAsFactorsv = argument tells R whether to convert all string variables to factors or not.

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