R: Fast conditional mean

condMean {ffbase} | R Documentation

## Fast conditional mean

### Description

`condMean` works like a very fast version of tapply with `FUN=mean`.

### Usage

    condMean(x, index, na.rm = FALSE, ...)

### Arguments

`x` | `numeric` vector to be averaged
`index` | (list of) `factor(s)` for which the mean will be calculated
`na.rm` | `logical` If `TRUE` `NA` values will be removed
`...` | not used

### Value

`array` with dimensions of `index`

[Package ffbase version 0.13.1 Index]