Path: csiph.com!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail
From: =?UTF-8?Q?Hans-Bernhard_Br=c3=b6ker?= <HBBroeker@t-online.de>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: placing expressions in "using" fails
Date: Fri, 19 May 2017 20:48:44 +0200
Lines: 15
Message-ID: <eo8t0jFnad1U1@mid.dfncis.de>
References: <a93248a5-f227-4af7-a807-93f7d78faee6@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: news.dfncis.de KqL4pDO5rLJPgEmqCKAXBgZI3sSwkWMCdXbN9Al4GhnLtbsBN8FaTunuXr
Cancel-Lock: sha1:NTvkkEDhxe3pB8xneiTYv1USx4k=
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1
In-Reply-To: <a93248a5-f227-4af7-a807-93f7d78faee6@googlegroups.com>
Content-Language: de-DE
Xref: csiph.com comp.graphics.apps.gnuplot:3647

Am 19.05.2017 um 19:09 schrieb Fritz Sonnichsen:

> However when I use this construct I get and "invalid expression" condition and the field "$17" appears to be empty (it is not).

That's because the $1, $2 ... short-hand notation only reaches up to $9. 
  For higher column numbers you should really use the long-hand syntax 
column(<n>).

> The gnuplot doc I am referring to is: http://gnuplot.sourceforge.net/docs_4.2/node133.html

That's the documentation of a version of gnuplot that's between 8 and 10 
_years_ old now, or to put it differently, it's about 20 releases out of 
date.  If you're not using an equally ancient version of gnuplot itself, 
you should not be using this edition of the documentation; and if you 
are, you should seriously consider updating.