Alignment of equations in docx

[tsuikitho]

Hello, I don't know whether this is a bug related to pandoc. Please help me.

I write a txt file as follows:

$$
\begin{align*}
ax^2+bx+c &= 0\\
x &= \frac{-b\pm\sqrt{b^2-4ac}}{2a}
\end{align*}
$$

Save it as test.txt.
then convert the file to docx by pandoc (1.15.0.6):

pandoc -s test.txt -o test.docx

The equations can be displayed, but cannot be aligned correctly, see the following screen capture:

I am using word 2013 in windows 8.1.
The equations should be aligned with the "=" sign. But It seems that word treats the equations as a matrix with 4 entries.

When I convet the same latex code to mml in formula sheet (http://formulasheet.com/) and paste the mml code obtained into word, the equation can be displayed and aligned correctly:

For your reference, here is the mml code

<math xmlns="http://www.w3.org/1998/Math/MathML">
<mtable>
<mtr><mtd>
<mrow><mi>a</mi><msup><mi>x</mi><mn>2</mn></msup><mo>+</mo><mi>b</mi><mi>x</mi><mo>+</mo><mi>c</mi><maligngroup/><maligngroup/><mo>=</mo><mn>0</mn></mrow></mtd></mtr>
<mtr><mtd>
<mrow><mi>x</mi><maligngroup/><maligngroup/><mo>=</mo><mfrac><mrow><mo>-</mo><mi>b</mi><mo>&#xb1;</mo><msqrt><msup><mi>b</mi><mn>2</mn></msup><mo>-</mo><mn>4</mn><mi>a</mi><mi>c</mi></msqrt></mrow><mrow><mn>2</mn><mi>a</mi></mrow></mfrac></mrow></mtd></mtr>
<mtr><mtd>
<mrow/></mtd></mtr>
</mtable>
</math>

Is this an issue related to pandoc? How to solve it? Thank you very much.

[jgm]

Can you send a docx file with the correct equation
(which you produced by pasting the mml code)? I'd
like to look at how Word lays it out.

+++ tsuikitho [Jul 18 15 07:21 ]:

Hello, I don't know whether this is a bug related to pandoc. Please
help me.

I write a txt file as follows:
$$
\begin{align_}
ax^2+bx+c &= 0
x &= \frac{-b\pm\sqrt{b^2-4ac}}{2a}
\end{align_}
$$

Save it as test.txt.
then convert the file to docx by pandoc (1.15.0.6):
pandoc -s test.txt -o test.docx

The equations can be displayed, but cannot be aligned correctly, see
the following screen capture:
[1]convertedfrompandoc

I am using word 2013 in windows 8.1.
The equations should be aligned with the "=" sign. But It seems that
word treats the equations as a matrix with 4 entries.

When I convet the same latex code to mml in formula sheet
([2]http://formulasheet.com/) and paste the mml code obtained into
word, the equation can be displayed and aligned correctly:
[3]pastemml

For your reference, here is the mml code

ax2+bx< mo>+c=0 x=-b±b2-4ac2a

Is this an issue related to pandoc? How to solve it? Thank you very
much.

—
Reply to this email directly or [4]view it on GitHub.

References

1. https://cloud.githubusercontent.com/assets/13394147/8761863/b7c18512-2d99-11e5-805d-bcccc9c82fc2.png
2. http://formulasheet.com/
3. https://cloud.githubusercontent.com/assets/13394147/8761877/2cd8277a-2d9a-11e5-9bb0-9f56f75b30c5.png
4. Alignment of equations in docx #2310

[tsuikitho]

Generated from pandoc:
https://drive.google.com/open?id=0By2Yx9mn5CutRXRKSDFMVDJiSjg

By mml code
https://drive.google.com/open?id=0By2Yx9mn5CutX19vdktyMmpjU3M

Thank you

[hftf]

It seems texmath converts both align* (and similar structures) and matrices (and similar) to EArray. An EArray element becomes a matrix element (<m:m>) instead of an equation array element (<m:eqArr>):

$ ghci

Prelude> import Text.TeXMath

Prelude Text.TeXMath> readTeX "\\begin{align*}a&=b\\end{align*}"
Right [EArray [AlignRight,AlignLeft] [[[EIdentifier "a"],[ESymbol Rel "=",EIdentifier "b"]]]]

Prelude Text.TeXMath> writeOMML DisplayInline [Text.TeXMath.Types.EArray [] []]
Element {elName = QName {qName = "oMath", qURI = Nothing, qPrefix = Just "m"}, ...

[jgm]

So, maybe we need to add an EEqnArray element in texmath,
and modify all the readers and writers to use it?

+++ Ophir Lifshitz [Jul 22 15 13:45 ]:

It seems texmath [1]converts both align* (and similar structures) and
matrices (and similar) to EArray. An EArray element [2]becomes a
[3]matrix element (<m:m>) instead of an equation array element
(<m:eqArr>):

$ ghci

Prelude> import Text.TeXMath

Prelude Text.TeXMath> readTeX "\begin{align_}a&=b\end{align_}"
Right [EArray [AlignRight,AlignLeft] [[[EIdentifier "a"],[ESymbol Rel "=",EIdent
ifier "b"]]]]

Prelude Text.TeXMath> writeOMML DisplayInline [Text.TeXMath.Types.EArray [] []]
Element {elName = QName {qName = "oMath", qURI = Nothing, qPrefix = Just "m"}, .
..

—
Reply to this email directly or [4]view it on GitHub.

References

1. https://github.com/jgm/texmath/blob/b747cde8f3cfb1a2e5651fd8426eb51d126b20dd/src/Text/TeXMath/Readers/TeX.hs#L388-L389
2. https://github.com/jgm/texmath/blob/b747cde8f3cfb1a2e5651fd8426eb51d126b20dd/src/Text/TeXMath/Writers/OMML.hs#L203
3. https://github.com/jgm/texmath/blob/b747cde8f3cfb1a2e5651fd8426eb51d126b20dd/src/Text/TeXMath/Writers/OMML.hs#L71
4. Alignment of equations in docx #2310 (comment)

[jgm]

The ooml generated by texmath (and used by pandoc in the docx) has:

    <m:m>
      <m:mPr>
        <m:baseJc m:val="center" />
        <m:plcHide m:val="on" />
        <m:mcs>
          <m:mc>
            <m:mcPr>
              <m:mcJc m:val="right" />
            </m:mcPr>
          </m:mc>
          <m:mc>
            <m:mcPr>
              <m:mcJc m:val="left" />
            </m:mcPr>
          </m:mc>
        </m:mcs>
      </m:mPr>
...

My understanding is that this should cause the second column of the array to be left-justified. But for some reason it is centered in Word. If it were left-justified, the equation would look right.

Anyone understand why it isn't?

[danil-tolkachev]

Move message to #2864. Sorry for noise.