[comp.text] TeXhax Digest V89 #38

TeXhax@cs.washington.edu (TeXhax Digest) (05/11/89)

TeXhax Digest    Saturday, April 22, 1989  Volume 89 : Issue 38

Moderators: Tiina Modisett and Pierre MacKay

%%% The TeXhax digest is brought to you as a service of the TeX Users Group %%%
%%%       in cooperation with the UnixTeX distribution service at the       %%%
%%%                      University of Washington                           %%%

Today's Topics:         

                 Needed: Pictures of past TUG meeting participants
                Needed: Postscript/LaTeX-generating drawing program
                       Re: PROFILE on VMS--testers needed
                   Re: problem with the eqnarray environment
             Needed: a macro which would=  \input on a portion of a file
                          Re: Linear system macros
                           Re: Nested Conditionals
                       Re: Version 2.95 of TeX vs. 2.93
                        A warning for TeX implementors
              Problem: Defining non-ASCII characters for TeX/LaTeX
                                TeX for OS/2
                         Newsletter macros for TeX
                What after TeX, and, Book: "TeX in Practice"
                   Needed: mode_def's for LaserWriter NTX
              Problem with the screen previewer for VT100 terminals

-----------------------------------------------------------------------------

Date: Mon, 17 Apr 89  11:49 PDT
From: DLATEX%UCBCMSA.BITNET@UWAVM.ACS.WASHINGTON.EDU
Subject: Needed: Pictures of past TUG meeting participants
Keywords: general

We are currently looking for pictures of past TUG meeting participants to
be included in this year's tenth anniversary program. Since this is the tenth
anniversary bash, we are hoping to spice up the program with some photos of
past (and present) TUG members. We would like prints and negatives. Make sure
to label them with your name and address (somewhere) so we can return them
to you.  If there are any questions about this, please contact the TeX Users
Group in Providence, RI at (401) 751-7760. Thanks.
Doug Henderson (on behalf of the)
TeX Users Group
P.O Box 9506
Providence, RI
02940

---------------------------------------------------------------------------

Date: Sun, 16 Apr 89 14:37 EST
From: Henning Schulzrinne <HGSCHULZ@cs.umass.EDU>
Subject: Needed: Postscript/LaTeX-generating drawing program
Keywords: PostScript, LaTeX, VMS, Ultrix, IBM PC

I am looking for a program that allows interactive (!) generation of
line drawings on a VAX workstation (VMS or Ultrix) or IBM PC, akin to
MacDraw or MacDraft, and produces either Postscript or LaTeX-picture
commands (or anything else suitable for integration with LaTeX).

Thanks in advance.

Henning Schulzrinne
Department of Electrical and Computer Engineering
University of Massachusetts at Amherst
Amherst, MA 01003
USA

phone: (413) 545-3179 (EST)
FAX:   (413) 545-0724
CS/Arpanet: HGSCHULZ@CS.UMASS.EDU

--------------------------------------------------------------------------

Date: Sun, 16 Apr 89 14:05:48 BST
From: Dr R M Damerell (RHBNC) <damerell@NSS.Cs.Ucl.AC.UK>
Subject: Re: PROFILE on VMS--testers needed
Keywords: PROFILE, VMS

The last tape I got from Stanford (a long time ago) had a program called
Profile, written by Knuth. It produces an execution profile for a PAscal
program by reading the code and making reasonable assumptions on how it
might execute on a typical machine. I have adapted it to work (on at 
least one occasion) on VMS. Are there any VMS users out there interested
in trying it & reporting bugs? Mark

--------------------------------------------------------------------------

Date: SAT 15 APR 1989 15:07:00 EST
From: INHB000 <INHB%MCGILLC.BITNET@UWAVM.ACS.WASHINGTON.EDU>
Subject: Re: problem with the eqnarray environment
Keywords: TeX, eqnarray

I have noticed a problem: all the transmissions from you
have the braces deleted.  You will see the missing braces in the \begin
and \end{eqnarray} below that I copied exactly from what I rec'd.  I
have had the same problem in sending, but not receiving memos from a
correspondent at the University of Tennessee.

While looking through this issue, I noticed the following from Lamport:
>  Amitabh Shah wants to type
>
>     \begin eqnarray
>       \left[ ... \\
>          ... \right]
>     \end eqnarray
>
>  Unfortunately, \left and \right must come in matching pairs within a
>  single formula.  An eqnarray environment consists of a sequence
>  of equations, each of which consists of three separate formulas.
>
>  To make delimiters that span multiple lines, one needs to use
>  struts (to get TeX to make big delimiters) and \raisebox (to
>  position them vertically and make TeX think that they aren't
>  very big).

Might I suggest an alternative, illustrated by this somewhat silly
example:

\begin{eqnarray*}
\left[\sum_{l\le i\le m\atop m\le j \le n}\int_0^1{f(x)\,dx\over
sin^2x}\right.\\
\left.\vphantom{\sum_{l\le i\le m\atop m\le j \le n}\int_0^1{f(x)\,dx\over
sin^2x}}\Theta(x)\right]&=&0
\end{eqnarray*}

Although the use of \left. doesn't appear to be explicitly mentioned
anywwhere, it does work.  Although the results in that example look
dreadful, but it is what is wanted.

Michael Barr

-----------------------------------------------------------------------------

Date: Mon, 17 Apr 89 16:27:45 CDT
From: Don Hosek <U33297%UICVM.UIC.EDU@UWAVM.ACS.WASHINGTON.EDU>
Subject: Needed: a macro which would=  \input on a portion of a file
Keywords: macro, TeX, \input

Has anybody ever written a macro that would produce the equivalent of
\input using a subset of lines on a file? I'd like to input TeX
and verbatim input from a subset of a file and want to keep myself
from re-inventing the wheel.

What I have in mind is suppose I have the following input file:
\today\ is an exciting day.
Yes it is
\TeX\ is fun.
Yes it is.

Typing \Verbfile[2-4] should produce
Yes it is
\TeX\ is fun.
Yes it is.

while \Input[1-3] should produce
April 17 is an exciting day. Yes it is TeX is fun.

Any ideas?

 dh

    Don Hosek           Internet: U33297@UICVM.UIC.EDU
    3916 Elmwood        Bitnet: U33297@UICVM.BITNET
    Stickney, IL 60402          DHOSEK@YMIR.BITNET
    Work: 312-996-2981  UUNet: dhosek@jarthur.claremont.edu
                        JANET: U33297%UICVM.UIC.EDU@UK.AC.EARN-RELAY

-------------------------------------------------------------------------

Date: Sat, 15 Apr 89 00:55 PDT
From: <ASND%TRIUMFRG.BITNET@UWAVM.ACS.WASHINGTON.EDU>
Subject: Re: Linear system macros
Keywords: macro, TeX, linear systems

Jim Hefferon wanted a macro for aligning linear systems.  I sent him a
copy of what I had been using, but then did some investigating and found
out that the `slow' way I had avoided was actually faster!  So here is
my new macro, \polyalignno.  The syntax is:

\polyalignno {<number>}{<lines>}
 where <lines> is any number of:
 <line> = <right math> [[ &<left math> &<right math> ]] <optional labels> \\
 where the contents of [[ ]] are repeated <number> times, and
 <right math>= math that will be right justified (e.g., 2y)
 <left math> = math that will be left justified (e.g., +,-,=)
 <optional labels> are one of:  <nothing>
                                \eqno{  }
                                \eqno{  }\polylabel{ }
                                \leqno{  }
                                &text
The \\ may be omitted from the final line.

Generally, <number> is the number of variables in the system.
See the examples below to make sense of this syntax.

If the equations or the labels are very wide, they may overlap each other,
unless the &text option is taken for the labelling; but then the equations
will not be exactly centered on the page.  If there aren't enough entries
in a row that needs a label, fill with enough &'s to get to the label column.

% - - - - - - - - -  TeX stuff  - - - - - -
\catcode`@=11
\def\polyeqno#1{\llap{\@lign$#1$}}
\def\polylabel#1{\kern-\displaywidth\rlap{\@lign$#1$}\kern\displaywidth}

\newtoks\Pr@@mble
\newcount\tempc@unt
\def\polyalignno#1#2{\tempc@unt=#1\relax\Pr@@mble={}%
  \def\eqno{&\polyeqno}\def\leqno{&\polylabel}%  See note below
%%\def\manyands{}%  See note below
%%\def\eqno{\manyands\polyeqno}\def\leqno{\manyands\polylabel}%  See note below
  \loop \Pr@@mble=\expandafter{\the\Pr@@mble
     &$\@lign\displaystyle{{}####{}}$\hfil&\hfil$\@lign\displaystyle{####}$}%
%%   \edef\manyands{\manyands&&}  % See note below
     \advance\tempc@unt-1 \ifnum\tempc@unt>0
  \repeat
  \let\\\cr
  \displ@y \tabskip \centering \halign to\displaywidth {\tabskip\z@skip
  \hfil$\@lign\displaystyle{##}$%
  \span\the\Pr@@mble \tabskip\centering &%    %&% See note below
  \tabskip\z@skip##\crcr #2\crcr}}
%  Note below:
%  You will note that a premature \eqno or \leqno ruins the alignment.
%  This can be fixed by using \manyands instead of a single & in the
%  definitions of \eqno and \leqno, inserting definitions for \manyands,
%  and doubling the final & (to &&) in the alignment template.  Although
%  these changes slow down processing a bit, I favor them for the convenience
%  of not having to pad with & & & & ...

\catcode`@=12
%
% --------  Examples  ------------
%
\def\\{$\backslash$}
Test with constant on left, and one label on the left. Note how
a premature \\\\ is OK\dots
$$
\polyalignno3{
99&=& 17x&+& 7y&-&2z\\
 9&=&117x&-& 2y&-&z\leqno{1.0}\\
33&=&  3x&+&77y\\}
$$
\dots but a premature \\eqno is wrong.
$$
\polyalignno3{
99&=& 17x&+& 7y&-&2z\\
 9&=&117x&-& 2y\eqno{\rm ERROR}\\
33&=&  3x&+&77y\\}
$$
unless the changes commented out are made.
Test with constant on left, numbers on right, and a label for the lot.
$$
\polyalignno3{
99&=& 17x&+& 7y&-&2z\eqno{1.1a}\\
 9&=&117x&-& 2y&-&z\eqno{1.1b}\polylabel{1.1}\\
33&=&  3x&+&77y& &\eqno{1.1c}}
$$
Try again with constants left justified on the right, and with left equation
numbers.
$$
\polyalignno3{
17x&+&7y&-&2z&=6&\leqno{1.2a}\\
117x&-&2y&-&z&=-2&\leqno{1.2b}\\
3x &+&77y&&&=12&\leqno{1.2c}\\}
$$
And finally with right justified constants on the right.
$$
\polyalignno3{
17x&+&7y&-&2z&=&6\eqno{1.3a}\\
117x&-&2y&-&z&=&-2\eqno{1.3b}\\
3x &+&77y&&&=&12\eqno{1.3c}\\}
$$
and finished.
\bye %  - - - - - - - - - - - - - - - - - - - - - - -

%                                 Donald Arseneau
%                                 asnd@triumfcl.bitnet

-----------------------------------------------------------------------------

Date: Mon, 17 Apr 89 17:36:50 CDT
From: svb@cssun.tamu.edu (Stephan v. Bechtolsheim)
Subject: Re: Nested Conditionals
Keywords: TeX, nested conditionals

Prof. Knuth was the only one who came up with a serious answer
(if you don't remember the problem, skip this note):
Define the macro \ifMyConditional as follows (actually define
\MyConditional and then call it as \if\MyConditional):
\def\MyConditional{%
	TT\fi
	Some compuations including
	a \let\ifResult = \iftrue or \iffalse.
	\ifResult
}

Now lok at the nested conditional:
\if...				% 1.
	....
	\if\MyConditional
		...
	\else
		...
	\fi
\fi

If 1. evaluates to true the \if\MyConditional expands
to \if TT\fi .... and that first \if is
neutralized through the \fi right after TT. Then later, of
course, \ifResult will be evaluated matching the \else and \fi as
desired.

If 1. evaluates to false, just look at it how nicely it works. \if
is a conditional which is recognized as such and skipped.

Clean, neat, simple.

Stephan

------------------------------------------------------------------------------

Date: Sun, 16 Apr 89 18:13:06 +0200
From: fj@iesd.dk (Frank Jensen)
Subject: Re: Version 2.95 of TeX vs. 2.93
Keywords: TeX

In TeXhax V89 #23, Kurt Lidl asked about benefits of upgrading to TeX
v2.95.  The moderators' note was:

> %%% Moderators' note: Almost all the recent changes to TeX have to
> %%% do with the behavior of the program when it is abruptly terminated
> %%% under extraordinary conditions.  The changes don't affect the
> %%% general functionality vary much if at all.

I have just compiled TeX v2.95 (and Metafont v1.7) on a Sun 3/60
runnning SunOS 3.5.  The above note made me wonder what the new
behavior was, so I made some tests.

  1) When I type ^D (control-D) in response to TeX's `**' prompt, it
     responds with:

	! End of file on the terminal... why?

     (but not followed by a newline character)  The Metafont response
     is similar, except that the newline character is not missing.

     So far so good, this is what it used to be!

  2) Then I tried to type a ^D in response to TeX's `*' prompt.  The
     response certainly was a dramatic change of the usual behavior:

	TeX enters an infinite loop!

     This loop is not so easy to terminate (you have to kill the TeX
     process somehow, and ^C is not sufficient!)
     (Note: TeX also enters an infinite loop if it can't find a
     certain file, and you type a ^D in response to TeX's request for
     another file name.)

If the behavior indicated by the last test is the only `benefit' I get
by upgrading to v2.95, then I don't think I'm going to install this
version!  (I liked much more the old behavior when TeX just said
``! Emergency stop.'' and then terminated)

What was the reasons for changing this behavior?  (Of course, the
infinite loop was not intended!!!?)

Frank Jensen,	fj@iesd.dk
Department of Mathematics and Computer Science
Aalborg University
DENMARK

%%%Moderators' note:

The changes, though some of them were undertaken as a result of behaviour
noted in the Unix environment, were introduced by Donald Knuth with a view
to certain questions of system independence.  I suppose we could restore
the use of ^D through the Unix change file, but it would make Unix 
behaviour a little extra bit different from that elsewhere, where
TeX will demand an input file (null.tex).  As you say, the loop was
definitely not intended.  That is what was cured in 2.98.  For now, 
avoid ^D.


-----------------------------------------------------------------------

Date: Tue, 18 Apr 89 21:11:07 BST
From: Chris Thompson <CET1%phoenix.cambridge.ac.uk@NSS.Cs.Ucl.AC.UK>
Subject: A warning for TeX implementors
Keywords: TeX

If there are other implementors who use |selector=new_string|, or
otherwise build a string in |str_pool|, as part of an implementation
of the 'E' response to an error prompt: don't assume that the current
string is initially empty (I did). If the error occurs while reading
a `file name', it won't be: e.g.

   \input wombat\foobar    % \foobar undefined

(Compare official fixes #339 and #342.)

Chris Thompson
JANET: cet1@uk.ac.cam.phx
ARPA:  cet1%phx.cam.ac.uk@nsfnet-relay.ac.uk

------------------------------------------------------------------------

Date: 16 Apr 89 21:36 +0100
From: Ole Brevik <o_brevik%avh.unit.uninett%NORUNIX.BITNET@CUNYVM.CUNY.EDU>
Subject: Problem: Defining non-ASCII characters for TeX/LaTeX
Keywords: TeX, LaTeX, ASCII

I want to define the nonstandard (non-ASCII) characters on my keyboard
(digital VT220 terminal) for use with TeX/LaTeX. I have read the TeXbook
over and over again, but all my trials result in errors or failures.

This is what I try to add as a "local modification" to LPLAIN. (The characters
f,x and e looks like lowercase norwegian letters on my terminal screen...).
%------------------------------------------------------------------------------
\catcode`\f=11  \def\f{\ae}
\catcode`\F=11  \def\F{\AE}
\catcode`\x=11  \def\x{\o}
\catcode`\X=11  \def\X{\O}
\catcode`\e=11  \def\e{\aa}
\catcode`\E=11  \def\E{\AA}

\uccode `f=`F   \uccode `F=`F
\uccode `x=`X   \uccode `X=`X
\uccode `e=`E   \uccode `E=`E

\lccode `F=`f   \lccode `f=`f
\lccode `X=`x   \lccode `x=`x
\lccode `E=`e   \lccode `e=`e

\sfcode`f=999   \sfcode`F=999
\sfcode`x=999   \sfcode`X=999
\sfcode`e=999   \sfcode`E=999
%------------------------------------------------------------------------------

INITEX accepts it, but the result is that all my norwegian letters end up
looking like $\Lambda$, and that was not the idea...

(I guess that what I do above is defining the control characters \F, \X, ...
to {\AE}, {\O},... --- but what I want is to type f and get the same result as
if I had written {\ae}.)

I would be very happy if someone could tell me what I should do instead
(please send answer to the address below), to define non-ASCII characters
(like the norwegian letters) for TeX/LaTeX.

: Ole Andre Brevik                   EAN address: <o_brevik@avh.unit.uninett> :
: Department of Informatics                                                   :
: University of Trondheim                                                     :
: AVH (College of Art and Science)                                            :
: Norway                                                                      :

%%% Moderators' note:  It seems to us that when you
%%% \catcode`\f=11  \def\f{\ae}
%%% 	.
%%% 	.
%%% \catcode`\E=11  \def\E{\AA}
%%% you are first specifying a redundancy (TeXbook p 44 near the top)
%%% in that you are saying that the ASCII code for f should be associated
%%% with the \catcode for a letter.  It already is, when initex is compiled!!
%%% Then you are defining a macro \f which is in no serious way associated
%%% with the letter f.  What you might do, though it would react painfully
%%% with the hyphenation system, is
%%% \catcode`\f=13  \let f = \ae
%%% It is not clear that this is entirely advisable, although a similar
%%% approach has been successful for dot-under letters in islamic
%%% language transcriptions, e.g
%%% \catcode`\!=13  \let ! = \d
%%% which allows !s to be used in place of \d s

 -----------------------------------------------------------------------------+

Date: Sun, 16 Apr 89 23:41 O
From: "Teo Kirkinen, HYLK, puh. 7084275" <KIRKINEN@CC.HELSINKI.FI>
Subject: TeX for OS/2
Keywords: TeX, OS/2

Is somebody already running TeX with the OS/2 operating system?

Teo Kirkinen
Helsinki University Computing Centre

BITNET: kirkinen@FINUH
Internet: kirkinen@cc.helsinki.FI

-----------------------------------------------------------------------------

Date: Mon, 17 Apr 89 20:36:55 edt
From: smithda@cpsvax.cps.msu.edu (J. Daniel Smith)
Subject: Newsletter macros for TeX
Keywords: TeX, newsletter style

Does anyone have a set of TeX macros for doing Newletters?  What I am
espically interested in is macros that allow for an article to be
continued on a later page (as is often done in newspapers and
newsletters).  

A TeX input file would look something like:
\beginarticle{How to Use \TeX}{4in}{HowTo}
Using TeX is very easy.......
...
\endarticle

This indicates the start of the article titled "How to Use \TeX".  On
the current page, there should be four inches of text.  What is left
should be saved (written to a file) using the key (filename) "HowTo".

Later in the TeX file one could then type:
\continuearticle{HowTo}

This would place the rest of the text from the article "HowTo" at this
point along with a line like
   (How to...continued from page 1)
at the top of the column.

Are such macros possible?  Has anyone written anything similar?  Of
couse things like double/multiple columns would also be nice, but I
think I can adapt the macros from the TeXbook to do this. 

Thanks for any and all help.
         Dan

J. Daniel Smith                      Internet: smithda@cpsvax.cps.msu.edu
Michigan State University              BITNET: smithdan@msuegr

Important references are given in boldface.  Italicized numbers indicate
fleeting references, wheras numbers in parentheses refer to mere
implications or unwarranted extrapolations.  Asterisks are used to
identifiy particularly distasteful passages.
          - Peter Schickele, The Definitive Biography of P.D.Q. Bach

--------------------------------------------------------------------------

Date: Mon, 17 Apr 89 05:53:57 CDT
From: svb@cssun.tamu.edu (Stephan v. Bechtolsheim)
Subject: What after TeX, and, Book: "TeX in Practice"
Keywords: TeX

Are there people around who have given SERIOUS considerations of
what they would like to add to TeX? By that I mean assume a product
TeY, which contains TeX as subset but contains some additional features?

I have started to make notes on this subject. I am looking now for TeX
wizards who would like to give me their feedback and discuss this with me.


I signed a contract with Springer Verlag to publish my book "TeX in Practice".
The book was formerly called "Another Look at TeX", but "TeX in Practice"
will be the final title.

I hope to have it done in time for the TUG meeting in Palo Alto. As soon
as it is published Springer will advertise in TUGboat and you will hear
from me again.

I am currently at about 1100 pages, 28 chapters (if I remember correctly),
I even have an editor (so it all will sound like "real English"!

Stephan Bechtolsheim

--------------------------------------------------------------------------

Date: Mon, 17 Apr 89 15:34:34 GDT
From: peter@aries5.uwaterloo.ca (Peter Bumbulis)
Subject: Needed: mode_def's for LaserWriter NTX
Keywords: LaserWriter NTX, mode_def

Does anyone have mode_def's for the Apple LaserWriter NTX? (Are they
the same as for the LaserWriter Plus?  I think that the Plus uses a
Canon CX engine and the NTX uses a Canon SX engine.) I tried printing
a document with CX tuned fonts on the NTX and it looked awful. It could
be that the toner cartridge is going (but the built in fonts still
look not too bad ...) Thanks,

Peter

---------------------------------------------------------------------------

Date: Mon, 17 Apr 89 15:20:51 EDT
From: WIMMER%EXCELAN.ECL1.URI.EDU@UWAVM.ACS.WASHINGTON.EDU
Subject: Problem with the screen previewer for VT100 terminals
Keywords: TeX, dviware, previewer

Hello!

	I am not on your mailing list as of yet, but have a question
	which I hope you can answer.  I recently received the supposed
	latest version of TeX (V2.93) and have successfully installed
	the drivers I need for my LN03+ laser printer and also for
	my Printronix line printer.  I am, however, having problems
	with the screen previewer for VT100 terminals, DVITOVDU.
	I get actual characters, but am missing most spaces between
	words and about one character every word.  Has anyone else
	used this and had the same problems?  Is there a way to `fix'
	it or am I just doing something wrong?  The default dummy
	font is [300]cmr10.pk and I've tried nearly ALL the fonts
	without much success.  I'd appreciate any help or steering the
	right direction I can get.  Thanks.

					Karen Wimmer

		                  Engineering Computer Lab
		    	         University of Rhode Island

	ps.   I sent a  message earlier with a weird return address.
	      Our machine was off the network for a while.  You can
	      reply to me at:

			WIMMER@ECL1.URI.EDU

						Thanks!

%%% Moderators' note: DVITOVDU is not intended to produce a proof-reader's
%%% copy, but only to show approximately what the page formatting will
%%% look like.  Dvitty is a bit better, but it too is ignorant of the
%%% difference between kerns and interword spaces, and produces rather
%%% arbitrary spaces along each line.  Crudetype will be the answer,
%%% if we can only get it working.  Anyone want to take on a web2c
%%% change file for crudetype?

-------------------------------------------------------------------------------

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