Re: [Groff] A trap with 'tbl'!

[Ted Harding]

I was using -ms too. However, since there was a block of text
preceding the table matter, there had already been a ".LP"
preceding the tbl code. Hence the ".vs 5m" took effect within
the paragraph initiated by .LP; however, I agree that using
".nr VS 5m" is the way to make vertical spacing extend
throughout a document (until explicitly rescinded), persisting
across paragraph breaks. But that would have been inappropriate
here (where the wider line spacing was only needed within the
table). If there has been text following the table, I would
have done another ".LP" which would have cancelled the ".vs 5m"
by making use of the (unchanged) \n[NS] register.

Thanks for the comments!
Ted.

On 31-Jul-11 15:27:06, Denis M. Wilson wrote:
> I was using -ms due to the .TH, and .vs does not
> work directly (what were you using?). It all
> worked when I used
>     .nr VS 5m
>     .LP
> 
> This is my command line:
>     groff -ww -t -ms infile
> 
> Denis
> 
> On Sun, 31 Jul 2011 15:19:36 +0100 (BST)
> (Ted Harding) <address@hidden> wrote:
> 
>> On 31-Jul-11 13:10:36, Denis M. Wilson wrote:
>> > Hello Ted,
>> > 
>> > On Fri, 29 Jul 2011 22:25:59 +0100 (BST)
>> > (Ted Harding) <address@hidden> wrote:
>> > 
>> >> Greetings All!
>> >> I'm writing to flag up a little trap that one might
>> >> fall into when using 'tbl'.
>> >> 
>> >> Background: I'm setting up a table and I want each
>> >> row to have a row number to the left of the table.
>> >> (etc)
>> > 
>> > Even with the corrections given by various respondents,
>> > the result does not work for me: the title row is numbered,
>> > but the last row on each page is not. I couldn't fix this,
>> > but if it is only the signature lines which are to be numbered,
>> > you could omit the \v'-1.5m' from your definition, as this
>> > puts the number on the *previous* line. Why -1.5m anyway?
>> > Is this documented in tbl? Is m not a measure of horizontal
>> > distance? The amount should be an upwards movement of 1v
>> > plus the space taken up by the horizontal line (I couldn't
>> > find a definition of this).
>> > 
>> > Best wishes,
>> > Denis
>> 
>> Hi Denis,
>> I have to confess (yet again) to an inadvertent omission in
>> my first post which probably gave rise to your question.
>> In my later post I gave the full code as far as it is relevant.
>> Here it is again:
>> 
>> .vs 5m
>> .ds lmn \Z'\v'-1.5m'\h'-\w'\\n+[lmno]\0\0\0\0\0'u'\\n[lmno]'
>> .nr lmno 0 1
>> .nr FM \n[FM]+5m
>> .TS H
>> expand tab(#);
>> ce cw(2.0i) ce.
>> Name (in Capitals)#Address#Signature
>> _
>> .TH
>> .T&
>> |l |l |l|.
>> .nr lmno 0 1
>> \*[lmn]
>> _
>> \*[lmn]
>> _
>> \*[lmn]
>> _
>> \*[lmn]
>> _
>> \*[lmn]
>> _
>> \*[lmn]
>> _
>> .TE
>> 
>> Notice the ".vs 5m" at the start. This makes each box
>> adequate to contain a vertical space of 5m. This is to
>> allow space for people to write their names, addresses
>> and signatures.
>> 
>> Then, without the "\v'-1.5m'" in the definition of \*[lmn],
>> the row number would be level with the bottom of the box
>> (i.e. just above the horizontal line). With the "\v'-1.5m'",
>> the row number at the side is pretty well vertically centred
>> between the top and bottom of the box.
>> 
>> As you observed, without taking some step to increase the
>> height of the box, the "\v'-1.5m'" will lift the number to
>> the level of the line above, since each box is then only 1v,
>> plus a bit, in height.
>> 
>> Sorry to have caused confusion!
>> Ted.
>> 
>> --------------------------------------------------------------------
>> E-Mail: (Ted Harding) <address@hidden>
>> Fax-to-email: +44 (0)870 094 0861
>> Date: 31-Jul-11                                       Time: 15:17:54
>> ------------------------------ XFMail ------------------------------
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Date: 31-Jul-11                                       Time: 16:52:59
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