ropen

IO

SYNTAX

ropen("infile")
ropen()

DESCRIPTION

Ropen() opens infile for reading. A subsequent ropen() with no arguments closes the previously opened infile. A file which is re-opened with ropen(infile) positions the stream at the beginning of the file.

EXAMPLES

proc r() {
   ropen("file.dat")
   for (i=0; i<ndat; i=i+1) {
      x[i] = fscan()  y[i]=fscan()
   }
   ropen()
}

DIAGNOSTICS

This function returns 0 if the file is not successfully opened.

SEE ALSO

read , fscan , getstr , File

BUGS

There is no way to open more than one read file at a time. The same is true for write files.

wopen

IO

SYNTAX

wopen("outfile)
wopen()

DESCRIPTION

Wopen is similar to ropen but opens a file for writing. Contents of an already existing outfile are destroyed. Wopened files are written to with fprint . With no argument, the previously wopened file is closed. Wopen returns 0 on failure to open a file.

EXAMPLES

proc w() {
   wopen("file.dat")
   for (i=0; i<ndat; i=i+1) {
      fprint("%g %g\n", x[i], y[i])
   }
   wopen()
}

SEE ALSO

fprint , File

xopen

IO

SYNTAX

xopen("hocfile")
xopen("hocfile", "RCSrevision")

DESCRIPTION

Xopen() executes the commands in hocfile. This is a convenient way to define user functions and procedures. An optional second argument is the RCS revision number in the form of a string. The RCS file with that revision number is checked out into a temporary file and executed. The temporary file is then removed. A file of the same primary name is unaffected.

fprint

IO
Same as printf but prints to a file opened with wopen . If no file is opened it prints to the standard output.

neuron/general/function/io/ropen.hel : 1668 Jul 19