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|
+-----------------------------------------------------------------------------+
| halign |
+-----------------------------------------------------------------------------+
\halign{ preamble\cr
tabular text\cr}
Abbreviation: ã|noneã%
Parameters: ã|preamble, tabular text, submarkupã%
Submarkup: ã|\lft, \ctr, \rt, \cr, \noalign, \tabskip,
\omit, \multispan, \phantom, && (column repeat)ã%
ã|Description:ã%
The \halign markup is a way of making tables without tabbing. A preamble,
or sample line, is included immediately after \halign to act as a template
for the text in each column. Each successive column in a row begins with an
ampersand (&). Column descriptions may contain horizontal spaces, indents,
quads, and horizontal fills. Each column description must have a pound
sign (hash mark, #) which acts as a reference variable, so that text can be
substituted.
The halign is read in its entirety. Every column is treated as a box
whose width is equal to the largest entry.
Besides horizontal mode markup such as \indent, you can use the
following submarkup in the \halign.
\lft in the preamble will left justify each entry in a column.
\ctr in the preamble will center each entry in a column.
\rt in the preamble will right justify each entry in a column.
\cr marks the end of the preamble, and the end of each row.
\noalign is used outside of the preamble. It allows you to enter vertical
mode text into a table. You must not end a \noalign with a \cr. For
example, if you wanted to skip a blank line between two row entries, you
would use \noalign{\vs{\bl}}:
1000&32\cr
\noalign{\vs{\bl}}
2000&43\cr
\tabskip puts an equal amount of space (glue) between columns. A
specification of
\tabskip 20pt plus 15pt minus 10pt
indicates that the each column is set 20 points apart. If after the initial
try it is determined that the table is still narrower than the width of the
page, up to an additional 15 points of space is put between columns to try
and get the table to spread across the entire page. If after the initial
try of 20 points between each column it is determined that the table is
too wide to fit on the page, up to 10 points is subtracted from the space
between each column to try and get the table to fit on the page.
\omit can be used to disable to preamble specification for that column
and row. \omit only works for one column of one row. For example, if a
preamble
\halign{\lft{#}&\rt{#}\cr
was specified, then to center a header over a column, you could enter
\omit\ctr{Header 1}&\omit\ctr{Header 2}\cr
1000&2000\cr
\multispan is used to permit spanning of several columns. For example, if
you had a preamble of
\halign{\rt{#}&\rt{#}&\rt{#}\cr
and you wanted to center a title over the second and third columns, you
would enter:
first column&\multispan2\ctr{Spanned title}\cr
\phantom is used in decimal alignment. For example,
00.1234&12.231\cr
72.8\phantom{000}&1.2\phantom{00}\cr
would print the partial table:
+-----------------------------------------------------------------------------+
| |
| 00.1234 12.231 |
| 72.8 1.2 |
| |
+-----------------------------------------------------------------------------+
&& is used to indicate that the following column preamble is to be repeated
for each of the remaining of columns. For example, if you wanted the first
column centered, the second column left justified, and the next five columns
right justified, you could enter
\halign{\ctr{#}&\lft{#}&\rt{#}&\rt{#}&
\rt{#}&\rt{#}&\rt{#}\cr
Using the column repeat indicator (&&) you can simplify this to
\halign{\ctr{#}&\lft{#}&&\rt{#}\cr
This specification then says that columns 3, 4, etc. all use the same
preamble, "\rt{#}".
ã|Example:ã%
This example illustrates \omit, \qquad and \tabskip.
\tabskip .5in plus .4in minus .3in
\halign{\rt{#}&\qquad\lft{#}\cr
\omit\ctr{Case}&\omit\qquad\ctr{Blast}\cr
\noalign{\vs{2pt}\hrule\vs{2pt}}
5000 MT&500\cr
10000 MT&845--1050\cr }
+-----------------------------------------------------------------------------+
| |
| |
| ..........5000.MT.......500............ |
| 10000 MT 845--1050 |
| |
+-----------------------------------------------------------------------------+
ã|Example:ã%
This example makes use of \multispan, \indent,
\horizontalspace, \noalign and column repeat (&&).
\tabletitle{Surface Land Temperature (degrees C)\lbr
Changes after Exchanges}
\vs{10pt}
\halign{\indent\lft{#}&\hs{2em}\rt{#}
&&\hs{1em}\rt{#}\cr
Case&\multispan4\ctr{Post Detonations (Days)}\cr
Megatonnage&20&100&200&300\cr
\noalign{\vs{10pt}}
1000&-22&8&7&13\cr
3000&9&6&8&10\cr
5000&-7&-26&-20&-11\cr
10000&-24&-45&-26&-9\cr}
+-----------------------------------------------------------------------------+
| |
| Table 1 |
| Surface Land Temperature (degrees C) |
| Changes after Exchanges |
| |
| |
| Case Post Detonations (Days) |
| Megatonnage 20 100 200 300 |
| |
| 1000 -22 8 7 13 |
| 3000 9 6 8 10 |
| 5000 -7 -26 -20 -11 |
| 10000 -24 -45 -26 -9 |
| |
+-----------------------------------------------------------------------------+
ã|Notes:ã%
\halign takes less computer time than \settabs because it is a basic
TEX command. The advantages to \halign over \settabs are:
* maximum column widths are calculated automatically; you must measure
the longest entry with \settabs.
* templates are more versatile than \settabs; repeatable information can
be included in the preamble.
* greater flexibility.
Refer to The TEXbook for more about \halign, \cr, \noalign, \tabskip,
\phantom, \omit, \multispan, or && (column repeat).
You can use \autofootnote, \autoendnote, and \footnote inside of an
\halign, so long as they are not also inside an \hbox or \vbox.
Refer to the description of \leader for an example of using \halign with
dot leadering.
See \strut for row alignment.
Do not put a \cr on the same line as \noalign.
|
