i2index: Input parameter check for subsetting operations
In MsCoreUtils: Core Utils for Mass Spectrometry Data

Description Usage Arguments Value Author(s) Examples

i2index is a simple helper function to be used in subsetting functions. It checks and converts the parameter i, which can be of type integer, logical or character to integer vector that can be used as index for subsetting.

1	i2index(i, length = length(i), names = NULL)

`i`	`character` `logical` or `integer` used in `[i]` for subsetting.
`length`	`integer` representing the `length` of the object to be subsetted.
`names`	`character` with the names (rownames or similar) of the object. This is only required if `i` is of type `character`.

integer with the indices

Johannes Rainer

## With `i` being an `integer`
i2index(c(4, 1, 3), length = 10)

## With `i` being a `logical`
i2index(c(TRUE, FALSE, FALSE, TRUE, FALSE), length = 5)

## With `i` being a `character`
i2index(c("b", "a", "d"), length = 5, names = c("a", "b", "c", "d", "e"))