[GAP Forum] Writing to File
gap at gap.zssm.zp.ua
Sun Apr 18 19:10:01 BST 2004
if I understand your task perfectly, you would like to write certain
information to the text file and you need to increase the number of
symbols per line in the output file.
There are several approaches to this.
The simplest, but less flexible is to use 'LogTo("filename");'
and it will just copy the output from the screen to the file.
In this case you may use the command 'SizeScreen([256,]);' to
reach the maximum possible length of the line, but no more than 256
More opportunities are provided by using streams, and it is very
useful that your are already looking in this direction. Indeed,
'DirectoryTemporary()' works only for UNIX-type systems, but this
function is not essential in reaching your aims. In the example you
cited this function is used to create a filename in the temporary
directory, but you may enter the next command from this example in the
output := OutputTextFile( "filename", true );;
and it will create the file "filename" just in your current directory.
Line length in this file can also be regulated by the SizeScreen
command - it will be changed on screen and in the stream
You could also be interested *** to have all output in one single line
of text without line breaks *** - in conditions above, this may be
achieved entering the command
SetPrintFormattingStatus( out, false )
Hope this helps.
On Sunday, April 18, 2004 at 4:46:57 PM
Bruce W. Colletti <bcolletti at compuserve.com> wrote:
> Re GAP 4.3fix4 running under WinXP Home.
> How do I set the record length of an output text file?
> When printing to the file, numbers follow one another (as desired) until too many occur, at which time GAP automatically creates a new output line. Numbers are separated by a space or tab.
> LogTo("filename") opens the file...maybe that's the problem. If so, what else should I use? I've tried an example in the manual that starts:
> name := Filename(DirectoryTemporary(),"test");
> but GAP gags on the DirectoryTemporary() command.
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