Checks if there is an open connection to a file

Checks if there is an open connection to a file.

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

Arguments

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.

Value

Returns a logical

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

Author

Henrik Bengtsson

See also

See isOpen() in connections. showConnections().