## Drop Redundant Extent Information

## Usage

    drop(x)

## Value

If `x` is an object with a `dim` attribute (e.g. a matrix or array), then `drop`, returns an object like `x`, but with any extents of length one removed. Any accompanying `dimnames` attribute is adjusted and returned with `x`.

Array subsetting typically performs this reduction, but sometimes it is useful to invoke `drop` directly.

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