# tilde

##### Tilde Operator

Tilde is used to separate the left- and right-hand sides in a model formula.

- Keywords
- models

##### Usage

`y ~ model`

##### Arguments

- y, model
- symbolic expressions.

##### Details

The left-hand side is optional, and one-sided formulae are used in some contexts.

A formula has mode `call`

. It can be subsetted by
`[[`

: the components are `~`

, the left-hand side (if
present) and the right-hand side *in that order*.

##### References

Chambers, J. M. and Hastie, T. J. (1992)
*Statistical models.*
Chapter 2 of *Statistical Models in S*
eds J. M. Chambers and T. J. Hastie, Wadsworth & Brooks/Cole.

##### See Also

*Documentation reproduced from package base, version 3.1.3, License: Part of R 3.1.3*

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