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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Does MathML provide any tagging scheme for lines striking through row and column? – CV Radhakrishnan Sep 16 '12 at 03:44
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I found "verticalstrike" and "horizontalstrike", but I do not know how to use it with matrices. https://developer.mozilla.org/en-US/docs/MathML/Element/menclose – Pan Sep 16 '12 at 09:23
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Thanks, have given a try and provided an example. Does that sound good enough? – CV Radhakrishnan Sep 16 '12 at 11:17
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Yes, of course. – Pan Sep 17 '12 at 08:39
1 Answers
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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{equation}
\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}
\end{equation}
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>γ</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>α</mi>
<mo class="MathClass-bin">-</mo>
<mi>β</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>ψ</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>
</math>
The above MathML rendered in Firefox as 
David Carlisle
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CV Radhakrishnan
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Haven't you provided the \Css directive? Without suppressing top and bottom padding of
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 00:57 -
A test with CSS-code "mtd{padding-top: 0em; padding-bottom:0em;}": http://s14.directupload.net/images/120917/qawbh7uj.png
The exponents break the line.
– Pan Sep 17 '12 at 08:38 -
I am clueless, can you please take a look at: http://download.river-valley.com/misc/sx4.html ? – CV Radhakrishnan Sep 17 '12 at 09:21
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And screenshot of the page as rendered in my browser is at http://download.river-valley.com/misc/vs.png – CV Radhakrishnan Sep 17 '12 at 09:22
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