Hi Freddie!
On Wed, Dec 24, 2008 at 1:31 PM, Freddie Witherden
<fred...@witherden.org> wrote:
> Hi,
>
> I have been toying around with the LaTeX printing over the last couple
> of days and in the process have put together a few (potentially
> idiosyncratic) changes to the printing class. I would be interested to
> know what everyone thinks of this (i.e., is there enough interest that
> it is worth making them mainstream).
>
> Firstly, I added support for fractional power folding. If an exponent
> is of the form p/q where both p and q are rational (and q is not 2, as
> then a square-root is appropriate) then the fraction is folded. Here
> is an example:
> >>> ex = sympify('x^(3/4)')
> >>> latex(ex)
> '$x^{\\frac{3}{4}}$'
> >>> latex(ex,foldFracPowers=True)
> '$x^{3/4}$'
>
> As you can see instead of a fraction a plain old division symbol is
> used. This is often nice when handling fractions of the form p/q^a as
> it saves all-important vertical space and makes the power much more
> readable (as the font size will be larger).
>
> Secondly, I have added support for function bracket folding. If a
> function (lets say tan) has one and only one argument which does not
> itself need brackets, then it is possible to fold them. Another
> example if you will:
> >>> ex = sympify('tan(2*x)')
> >>> latex(ex)
> '$\\operatorname{tan}\\left(2 x\\right)$'
> >>> latex(ex,foldFuncBrackets=True)
> '$\\operatorname{tan}2 x$'
>
> This is done by the addition of a new function
> _needs_function_brackets, which is a more generalised form of
> needs_brackets, namely one that allows Mul and Pow to not require
> them. I am still testing this, however, so there may be some cases
> where it (erroneously) omits brackets. I am still working on a way to
> handle tan(x)*cos(x) (currently '$\\operatorname{cos}x \
> \operatorname{tan}2 x$') but it might come down to either a) folding
> tan(x*cos(x)) to tan xcos x or b) folding tan(x)*cos(x) to tan x cos x.
>
> Finally, I would like to apologise for my use of camelCase, I'll fix
> that soon.
Thanks a lot for this work. Is your code available somewhere? If you
use git, just publish your branch for example on github.com and we'll
then see how to integrate this. I like both things that you
implemented.
Thanks also for reporting several issues that you found along the way.
Happy Christmas,
Ondrej
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