R devel - Apr 2009 - HTML help

Hi,guys,

HTML help is not right for math formula:
For example:
I got the following formula in help page of ca.jo in urca package:

<p align="center"><i><B>X</B>_t =
<B>Pi</B>_1 <B>X</B>_{t-1} + ... +
<B>Pi</B>_k
<B>X</B>_{t-k} + <B>&mu;</B> + <B>Phi
D</B>_t + <B>varepsilon</B>_t
, quad (t = 1, ..., T),</i></p>
<p>

This presentation is just not good, however, in most browser,
with tag <math></math>, the formula in the tag works well.
such as in wikipedia. please check the same formula:
http://en.wikipedia.org/wiki/Johansen_test

Can someone please fix this?
help(ca.jo,offline=TRUE), we can get the formula right.

The problem seems to occur at the building process. Latex output is
right, but the HTML output is not good for math formula.

I guess this issue is not so difficult.

-- 
with best regards
Jack (Zhan, Hua Ping)
+1-514-8800518

JAck,

On Apr 14, 2009, at 22:50 , Jack (Zhan, Hua Ping) wrote:
> Hi,guys,
>
> HTML help is not right for math formula:
> For example:
> I got the following formula in help page of ca.jo in urca package:
>
> <p align="center"><i><B>X</B>_t =
<B>Pi</B>_1 <B>X</B>_{t-1} + ... +
> <B>Pi</B>_k
> <B>X</B>_{t-k} + <B>&mu;</B> + <B>Phi
D</B>_t + <B>varepsilon</B>_t
> , quad (t = 1, ..., T),</i></p>
> <p>
>
> This presentation is just not good, however, in most browser, with  
> tag <math></math>, the formula in the tag works well.
I don't see what you mean - just putting <math> tags around the above
doesn't change rendering at all. Moreover <math> is not a valid tag in
the HTML standard.

> such as in wikipedia. please check the same formula:
http://en.wikipedia.org/wiki/Johansen_test
>
Wikipedia uses bitmaps to represent those formulae, there are no HTML  
<math> tags involved there.

> Can someone please fix this?
> help(ca.jo,offline=TRUE), we can get the formula right.
>
> The problem seems to occur at the building process. Latex output is
> right, but the HTML output is not good for math formula.
>
> I guess this issue is not so difficult.
>
Well, then fix it and send us the patch please ...

Cheers,
Simon

Hi Jack,

I'm not sure about the <math> tag either, and it didn't work when
I tried
it.  I think the approach this web page uses may help in writing
mathematical symbols to HTML:

http://comers.citadel.edu/math_sym2005.htm

Cheers,
Mike


Jack (Zhan, Hua Ping) wrote:
> 
> 
> HTML help is not right for math formula:
> For example:
> I got the following formula in help page of ca.jo in urca package:
> 
> <p align="center">X_t = Pi_1 X_{t-1} + ... + Pi_k
> X_{t-k} + &mu; + Phi D_t + varepsilon_t
> , quad (t = 1, ..., T),</p>
> <p>
> 
> This presentation is just not good, however, in most browser,
> with tag <math></math>, the formula in the tag works well.
> such as in wikipedia. please check the same formula:
> http://en.wikipedia.org/wiki/Johansen_test
> 
> -- 
> with best regards
> Jack (Zhan, Hua Ping)
> +1-514-8800518
> 
> 
-- 
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