Menu
I encountered the following in R:
x=x+y%o%c(1.5,1.5)
I am wondering what is the meaning of %o% here. I tried googling but didn't have much luck
733
Generally speaking, the $ operator is used to extract or subset a specific part of a data object in R. For instance, this can be a data frame object or a list. In this example, I'll explain how to extract the values in a data frame columns using the $ operator.
1 Answer. %>% is called the forward pipe operator in R. It provides a mechanism for chaining commands with a new forward-pipe operator, %>%. This operator will forward a value, or the result of an expression, into the next function call/expression.
The %.% operator in dplyr allows one to put functions together without lots of nested parentheses. The flanking percent signs are R's way of denoting infix operators; you might have used %in% which corresponds to the match function or %*% which is matrix multiplication.
There are a number of shortcuts in R that use the %...% notation. %o% is the outer product of arrays
> 1:3 %o% 1:3
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 2 4 6
[3,] 3 6 9
There are a number of others, my most used is %in%:
3 %in% c(1,2,3,4) #TRUE
5 %in% c(1,2,3,4) #FALSE
3.4 %in% c(1,2,3,4) #FALSE
There are a few others, I don't know them all off the top of my head. But when you encounter them, you can check for documentation by using backticks around the %o% like ?`%o%`, or quotes ?'%o%' (or ?"%o%").
They are obviously difficult to google because of the percent sign.
84
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
