[Rd] HTML help

Simon Urbanek simon.urbanek at r-project.org
Wed Apr 15 17:09:16 CEST 2009


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 ...


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