newest returns newest file of a set of files

## Syntax

    k = newest(paths)
                k = newest(path1, path2, ..., pathn)

## Arguments

k

  an integer: the index of the newest file.

paths

  a character string vector, `paths(i)` is the pathname of `i`-th file.

pathi

  a character string, the pathname of `i`-th file

## Description

Given a set of pathnames `newest` returns the index of the newest one. Non existent files are supposed to be the oldest.

## Examples

    newest('SCI/modules/graphics/macros/bode.sci','SCI/modules/graphics/macros/bode.bin')
    newest(['SCI/modules/graphics/macros/bode.sci','SCI/modules/graphics/macros/bode.bin'])
    newest('SCI/modules/graphics/macros/bode.'+['sci','bin'])

## See also

- fileinfo