# a line through a column in MathML [closed]

I have a problem with MathML.

How can I draw a line through a column (row and column at the same time) in a matrix?

An example in TEX: Draw a line through one column of a matrix

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## closed as off topic by Jake, Alan Munn, Lev Bishop, Xavier, lockstepMay 19 '13 at 8:33

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Does MathML provide any tagging scheme for lines striking through row and column? –  CV Radhakrishnan Sep 16 '12 at 3:44
I found "verticalstrike" and "horizontalstrike", but I do not know how to use it with matrices. developer.mozilla.org/en-US/docs/MathML/Element/menclose –  Pan Sep 16 '12 at 9:23
Thanks, have given a try and provided an example. Does that sound good enough? –  CV Radhakrishnan Sep 16 '12 at 11:17
Yes, of course. –  Pan Sep 17 '12 at 8:39

## 1 Answer

The following code seems to work:

   \def\vs#1{\Tg<menclose notation="verticalstrike">#1\Tg</menclose>}
\Css{.array mtd{padding-top: 0em; padding-bottom:0em;}}

$$\begin{pmatrix} \vs{a+b} & 12 & a+b+c\\ \vs{c-d} & \gamma^2 & 0\\ \vs{a} & \alpha-\beta & abc\\ \vs{c-d} & \psi_n & d\\ \end{pmatrix}$$


If you have a working version of TeX4ht, you will get the following MathML output:

          <math xmlns="http://www.w3.org/1998/Math/MathML" display="block"
class="equation">
<mfenced separators="" open="(" close=")">
<mrow>
<mtable style="text-align:axis;" equalrows="false"
columnlines="none none none none none none none none none"
equalcolumns="false" class="array">
<mtr>
<mtd class="array" columnalign="center">
<menclose notation="verticalstrike">
<mi>a</mi>
<mo class="MathClass-bin">+</mo>
<mi>b</mi>
</menclose>
</mtd>
<mtd class="array" columnalign="center">
<mn>1</mn>
<mn>2</mn>
</mtd>
<mtd class="array" columnalign="center">
<mi>a</mi>
<mo class="MathClass-bin">+</mo>
<mi>b</mi>
<mo class="MathClass-bin">+</mo>
<mi>c</mi>
</mtd>
</mtr>
<mtr>
<mtd class="array" columnalign="center">
<menclose notation="verticalstrike">
<mi>c</mi>
<mo class="MathClass-bin">-</mo>
<mi>d</mi>
</menclose>
</mtd>
<mtd class="array" columnalign="center">
<msup>
<mrow>
<mi>&#947;</mi>
</mrow>
<mrow>
<mn>2</mn>
</mrow>
</msup>
</mtd>
<mtd class="array" columnalign="center">
<mn>0</mn>
</mtd>
</mtr>
<mtr>
<mtd class="array" columnalign="center">
<menclose notation="verticalstrike">
<mi>a</mi>
</menclose>
</mtd>
<mtd class="array" columnalign="center">
<mi>&#945;</mi>
<mo class="MathClass-bin">-</mo>
<mi>&#946;</mi>
</mtd>
<mtd class="array" columnalign="center">
<mi>a</mi>
<mi>b</mi>
<mi>c</mi>
</mtd>
</mtr>
<mtr>
<mtd class="array" columnalign="center">
<menclose notation="verticalstrike">
<mi>c</mi>
<mo class="MathClass-bin">-</mo>
<mi>d</mi>
</menclose>
</mtd>
<mtd class="array" columnalign="center">
<msub>
<mrow>
<mi>&#968;</mi>
</mrow>
<mrow>
<mi>n</mi>
</mrow>
</msub>
</mtd>
<mtd class="array" columnalign="center">
<mi>d</mi>
</mtd>
</mtr>
<mtr>
<mtd class="array" columnalign="center"></mtd>
</mtr>
</mtable>
</mrow>
</mfenced>
[/itex]


The above MathML rendered in Firefox as

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I tested it: s1.directupload.net/images/120916/vmbhchy5.png –  Pan Sep 16 '12 at 17:29
Haven't you provided the \Css directive? Without suppressing top and bottom padding of <td> contents in the matrix array, the vertical rule will be broken across rows as in your example. Can you please confirm this? –  CV Radhakrishnan Sep 17 '12 at 0:57
A test with CSS-code "mtd{padding-top: 0em; padding-bottom:0em;}": s14.directupload.net/images/120917/qawbh7uj.png The exponents break the line. –  Pan Sep 17 '12 at 8:38
I am clueless, can you please take a look at: download.river-valley.com/misc/sx4.html ? –  CV Radhakrishnan Sep 17 '12 at 9:21
And screenshot of the page as rendered in my browser is at download.river-valley.com/misc/vs.png –  CV Radhakrishnan Sep 17 '12 at 9:22