R.utils: isOpen.character – R documentation

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isOpen.character

Checks if there is an open connection to a file

Checks if there is an open connection to a file.

## S3 method for class 'character'
isOpen(pathname, rw=c("read", "write"), ...)

`pathname`	An `character` `vector`.
`rw`	A `character` `vector`. If `"read"`, a file is considered to be open if there exist an open connection that can read from that file. If `"write"`, a file is considered to be open if there exist an open connection that can write to that file. Both these values may be specified.
`...`	Not used.

Returns a logical vector indicating for each file whether there exists an open file connection or not.

Henrik Bengtsson