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I have recently come across the code |> in R. It is a vertical line character (pipe) followed by a greater than symbol. Here is an example: mtcars |> head() What is the |> code doing?
I have seen the use of %>% (percent greater than percent) function in some packages like dplyr and rvest. What does it mean? Is it a way to write closure blocks in R?
A carriage return (\r) makes the cursor jump to the first column (begin of the line) while the newline (\n) jumps to the next line and might also to the beginning of that line.
It's a matrix multiplication operator! From the documentation: Description: Multiplies two matrices, if they are conformable. If one argument is a vector, it will be promoted to either a row or column matrix to make the two arguments conformable. If both are vectors of the same length, it will return the inner product (as a matrix). Usage: x %*% y Arguments: x, y numeric or complex matrices or ...
R provides two different methods for accessing the elements of a list or data.frame: [] and [[]]. What is the difference between the two, and when should I use one over the other?
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What's the differences between & and &&, | and || in R? [duplicate] Asked 12 years, 4 months ago Modified 7 years, 4 months ago Viewed 82k times
R's syntax contains many ambiguous cases that have to be resolved one way or another. The parser chooses to resolve the bits of the expression in different orders depending on whether = or <- was used. To understand what is happening, you need to know that assignment silently returns the value that was assigned.
149 \r is a carriage return character; it tells your terminal emulator to move the cursor at the start of the line. The cursor is the position where the next characters will be rendered. So, printing a \r allows to override the current line of the terminal emulator.
I want to use dplyr::mutate () to create multiple new columns in a data frame. The column names and their contents should be dynamically generated. Example data from iris: library (dplyr) iris <-