mean {base} | R Documentation |

## Arithmetic Mean

### Description

Generic function for the (trimmed) arithmetic mean.

### Usage

```
mean(x, ...)
## Default S3 method:
mean(x, trim = 0, na.rm = FALSE, ...)
```

### Arguments

`x` |
an |

`trim` |
the fraction (0 to 0.5) of observations to be
trimmed from each end of |

`na.rm` |
a logical evaluating to |

`...` |
further arguments passed to or from other methods. |

### Value

If `trim`

is zero (the default), the arithmetic mean of the
values in `x`

is computed, as a numeric or complex vector of
length one. If `x`

is not logical (coerced to numeric), numeric
(including integer) or complex, `NA_real_`

is returned, with a warning.

If `trim`

is non-zero, a symmetrically trimmed mean is computed
with a fraction of `trim`

observations deleted from each end
before the mean is computed.

### References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
*The New S Language*.
Wadsworth & Brooks/Cole.

### See Also

`weighted.mean`

, `mean.POSIXct`

,
`colMeans`

for row and column means.

### Examples

```
x <- c(0:10, 50)
xm <- mean(x)
c(xm, mean(x, trim = 0.10))
```

*base*version 4.4.1 Index]