# Mean: (Weighted) Arithmetic Mean In DescTools: Tools for Descriptive Statistics

## Description

Generic function for the (trimmed) arithmetic mean, possibly with given weights.

## Usage

 ```1 2 3 4 5 6 7``` ```Mean(x, ...) ## S3 method for class 'Freq' Mean(x, breaks, ...) ## Default S3 method: Mean(x, weights = NULL, trim = 0, na.rm = FALSE, ...) ```

## Arguments

 `x` An R object. Currently there are methods for numeric/logical vectors and date, date-time and time interval objects. Complex vectors are allowed for `trim = 0`, only. `weights` a numerical vector of weights the same length as `x` giving the weights to use for elements of `x`. `trim` the fraction (0 to 0.5) of observations to be trimmed from each end of `x` before the mean is computed. Values of trim outside that range are taken as the nearest endpoint. `breaks` breaks for calculating the mean for classified data as composed by `Freq`. `na.rm` a logical value indicating whether `NA` values should be stripped before the computation proceeds. `...` 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.

`trim` and `weights` can't be used together at the same time.

## References

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

`weighted.mean`, `mean.POSIXct`, `colMeans` for row and column means.

## Examples

 ```1 2 3``` ``` x <- c(0:10, 50) xm <- Mean(x) c(xm, Mean(x, trim = 0.10)) ```

### Example output

``` 8.75 5.50
```

DescTools documentation built on June 17, 2021, 5:12 p.m.