Shulou(Shulou.com)05/31 Report--

This article mainly explains "what are the methods of using r language". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what are the methods of using r language?"

1.list.files traverses files in a folder

List.files (getwd ())

List.files (getwd (), pattern = "*. [R | v] $") # can match regular expressions

two。 Avoid using variable names

Specification: company name (NG) with an underscore, such as NG_books NG_function

Use the get () function to query the variable name to see if there is a return value, get ('c')

3. Convert the data frame to a matrix

If the data type in the data box is the same, you can use as.matrix to convert it to a matrix

Df

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