= Operators =

These are the '''operators''' supported by R.

<<TableOfContents>>

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== Description ==

Most operators work as expected. Some are spelled in unexpected ways, though.
 * `%/%` for floored division
 * `%%` for modulo

If both arguments to an operator are [[R/Vectors|vectors]], element-wise operations are performed.

R does not support a [[LinearAlgebra/Transposition|transposition]] operator. Instead use the 'transposition' function.

{{{
A_t = t(A)
}}}

Note that this gives the ''non-conjugate'' transpose. To get the [[LinearAlgebra/HermitianTranspose|Hermitian transpose]], try `Conj(t(A))`.

For [[R/Matrices|matrix]] multiplication, use `%*%`.

R does not support a matrix division operator. Instead use the `solve` function.
 * To evaluate a left division problem, as in `Ax = b`, try `x <- solve(A, b)`.
 * to evaluate a right division problem, as in `xA = b`, try `x <- t(solve(t(A), t(b)))`.

`&` and `|` are vectorized operators that return logical vectors. `&&` and `||` are the more familiar logic operators, i.e. they evaluate to `TRUE` or `FALSE` and feature short-circuiting. Note that R considers very few things to be 'falsy':
 * `NA`
 * `NULL`
 * an empty string
 * an empty vector
 * a vector containing only `NA` values



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CategoryRicottone