Re: [NTG-context] math: too big space between function and argument
On Wed, 25 May 2011, Paul Menzel wrote:
On Di, 2011-05-24 at 09:56 -0400, Aditya Mahajan wrote:
On Tue, 24 May 2011, Paul Menzel wrote:
to markup the probability measure and the parenthesis around the
argument, I defined the following command.
\define[1]\P{{\mathbf P}\left( #1 \right)}
Unfortunately the space between the P and the left ( is a little big in
my opinion. Is that correct or should/can I fix that somehow?
Getting these spaces is tricky; especially if you consider spaces before
and after the definition. Choose your pick:
\starttext
\startformula
A{\mathbf P}\left( ABC \right)B \quad
A\mathop{\kern\zeropoint\mathbf P}\left( ABC \right)B \quad
A{\mathbf P}\mathopen{}\left( ABC \right)\mathclose{}B \quad
A\mathop{\kern\zeropoint\mathbf P}\mathopen{}\left( ABC \right)\mathclose{}B
\quad
\stopformula
\stoptext
That looks tricky and complex.
But can be easily hidden behind a macro.
Could you explain the advantage over `\!` which Wolfgang suggested at
least for the space after the definition.
\! only corrects the space between the P and (, not the spacing before P,
and the space after ). Moreover, some of the math spacing rules change in
\scriptstyle and \scriptscriptstyle; using \mathop, \mathopen, and
\mathclose means that those rules are followed.
In addition, I think AMSTeX defines a command `\DeclareMathOperator` [1]
which takes care of these things
No. \DeclareMathOperator is just a fancy wrapper around
\mathop{\operatorfont ...}. A similar result can be achieved in ConTeXt
using
\declaremathcommand [...] [op] [\mfunction ...]
For defining user macros, I prefer \mathop{\mfunction{...}}.
Aditya
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Re: [NTG-context] math: too big space between function and argument
On Di, 2011-05-24 at 09:56 -0400, Aditya Mahajan wrote:
> On Tue, 24 May 2011, Paul Menzel wrote:
> > to markup the probability measure and the parenthesis around the
> > argument, I defined the following command.
> >
> > \define[1]\P{{\mathbf P}\left( #1 \right)}
> >
> > Unfortunately the space between the P and the left ( is a little big in
> > my opinion. Is that correct or should/can I fix that somehow?
>
> Getting these spaces is tricky; especially if you consider spaces before
> and after the definition. Choose your pick:
>
> \starttext
> \startformula
>A{\mathbf P}\left( ABC \right)B \quad
>A\mathop{\kern\zeropoint\mathbf P}\left( ABC \right)B \quad
>A{\mathbf P}\mathopen{}\left( ABC \right)\mathclose{}B \quad
>A\mathop{\kern\zeropoint\mathbf P}\mathopen{}\left( ABC
> \right)\mathclose{}B \quad
> \stopformula
> \stoptext
That looks tricky and complex.
> Some information from the mathsets module (which does not work with MkIV).
I hope you or somebody will have time to port that module to MkIV.
> The entry is the latex bug database is not viewable now.
>
> %D The \type{\left} and \type{\right} generate a math atom of type inner,
> %D while for math sets, we want a math open atom. To see the difference,
> %D consider
> %D
> %D \startbuffer
> %D \startformula
> %D 2\left(\frac {3}{4} \right) \qquad \hbox{ vs } \qquad
> %D 2\biggl( \frac {3}{4} \biggr)
> %D \stopformula
> %D
> %D and
> %D
> %D \startformula
> %D \Pr\left(\frac {3}{4} \right) \qquad \hbox{ vs } \qquad
> %D \Pr\biggl( \frac {3}{4} \biggr)
> %D \stopformula
> %D \stopbuffer
> %D \typebuffer
> %D
> %D which gives (notice the spacing before the parenthesis)
> %D
> %D \getbuffer
> %D
> %D I will assume that if \type{text} is something, then
> %D the default behaviour is desirable, if \type{text} is empty, then I add
> %D \type{\mathopen} and \type{\mathclose}. Using \type{\mathopen} to correct
> %D the spacing is due to Frank Mittelbach, see
> %D
> \hyphenatedurl{http://www.latex-project.org/cgi-bin/ltxbugs2html?pr=latex/3853}
> %D
> %D Mathset module ensures that we get the correct spacing in both cases
> %D \startbuffer
> %D \definemathset[SET][left=(,right=)]
> %D \startformula
> %D 2\SET{\frac{3}{4}} \qquad \hbox{ and } \qquad
> %D \PR{ \frac{3}{4} }
> %D \stopformula
> %D \stopbuffer
> %D \getbuffer[PR] \getbuffer which was typed as \typebuffer
> %D
> %D Also, if its argument is a single character, \type{\mathop} centers it
> to
> %D with respect to the math||axis. Compare the outputs of
> %D
> %D \startbuffer
> %D \ruledhbox{$\mathop{y}\nolimits_x\left\{A\,\middle|\,B\right\}$}
> %D \ruledhbox{$\mathop{\kern\zeropoint
> y}\nolimits_x\left\{A\,\middle|\,B\right\}$}
> %D \stopbuffer
> %D
> %D \typebuffer
> %D \getbuffer
> %D
> %D I have added a \type{\kern\zeropoint} to prevent that.
Could you explain the advantage over `\!` which Wolfgang suggested at
least for the space after the definition.
In addition, I think AMSTeX defines a command `\DeclareMathOperator` [1]
which takes care of these things.
Thanks,
Paul
[1] http://en.wikibooks.org/wiki/LaTeX/Advanced_Mathematics#Custom_operators
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Re: [NTG-context] math: too big space between function and argument
On Tue, 24 May 2011, Paul Menzel wrote:
Dear ConTeXt folks,
to markup the probability measure and the parenthesis around the
argument, I defined the following command.
\define[1]\P{{\mathbf P}\left( #1 \right)}
Unfortunately the space between the P and the left ( is a little big in
my opinion. Is that correct or should/can I fix that somehow?
Getting these spaces is tricky; especially if you consider spaces before
and after the definition. Choose your pick:
\starttext
\startformula
A{\mathbf P}\left( ABC \right)B \quad
A\mathop{\kern\zeropoint\mathbf P}\left( ABC \right)B \quad
A{\mathbf P}\mathopen{}\left( ABC \right)\mathclose{}B \quad
A\mathop{\kern\zeropoint\mathbf P}\mathopen{}\left( ABC \right)\mathclose{}B
\quad
\stopformula
\stoptext
Some information from the mathsets module (which does not work with MkIV).
The entry is the latex bug database is not viewable now.
%D The \type{\left} and \type{\right} generate a math atom of type inner,
%D while for math sets, we want a math open atom. To see the difference,
%D consider
%D
%D \startbuffer
%D \startformula
%D 2\left(\frac {3}{4} \right) \qquad \hbox{ vs } \qquad
%D 2\biggl( \frac {3}{4} \biggr)
%D \stopformula
%D
%D and
%D
%D \startformula
%D \Pr\left(\frac {3}{4} \right) \qquad \hbox{ vs } \qquad
%D \Pr\biggl( \frac {3}{4} \biggr)
%D \stopformula
%D \stopbuffer
%D \typebuffer
%D
%D which gives (notice the spacing before the parenthesis)
%D
%D \getbuffer
%D
%D I will assume that if \type{text} is something, then
%D the default behaviour is desirable, if \type{text} is empty, then I add
%D \type{\mathopen} and \type{\mathclose}. Using \type{\mathopen} to correct
%D the spacing is due to Frank Mittelbach, see
%D
\hyphenatedurl{http://www.latex-project.org/cgi-bin/ltxbugs2html?pr=latex/3853}
%D
%D Mathset module ensures that we get the correct spacing in both cases
%D \startbuffer
%D \definemathset[SET][left=(,right=)]
%D \startformula
%D 2\SET{\frac{3}{4}} \qquad \hbox{ and } \qquad
%D \PR{ \frac{3}{4} }
%D \stopformula
%D \stopbuffer
%D \getbuffer[PR] \getbuffer which was typed as \typebuffer
%D
%D Also, if its argument is a single character, \type{\mathop} centers it
to
%D with respect to the math||axis. Compare the outputs of
%D
%D \startbuffer
%D \ruledhbox{$\mathop{y}\nolimits_x\left\{A\,\middle|\,B\right\}$}
%D \ruledhbox{$\mathop{\kern\zeropoint
y}\nolimits_x\left\{A\,\middle|\,B\right\}$}
%D \stopbuffer
%D
%D \typebuffer
%D \getbuffer
%D
%D I have added a \type{\kern\zeropoint} to prevent that.
Aditya
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Re: [NTG-context] math: too big space between function and argument
Am 24.05.2011 um 13:14 schrieb Paul Menzel:
> Dear ConTeXt folks,
>
>
> to markup the probability measure and the parenthesis around the
> argument, I defined the following command.
>
> \define[1]\P{{\mathbf P}\left( #1 \right)}
>
> Unfortunately the space between the P and the left ( is a little big in
> my opinion. Is that correct or should/can I fix that somehow?
You can insert negative kerning with “\!”.
\define[1]\P{{\mathbf P}\!\left(#1\right)}
BTW: You redefine the already existing \P (expands to ¶) command.
Wolfgang
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[NTG-context] math: too big space between function and argument
Dear ConTeXt folks,
to markup the probability measure and the parenthesis around the
argument, I defined the following command.
\define[1]\P{{\mathbf P}\left( #1 \right)}
Unfortunately the space between the P and the left ( is a little big in
my opinion. Is that correct or should/can I fix that somehow?
Thanks,
Paul
mathbold.pdf
Description: Adobe PDF document
\define[1]\P{{\mathbf P}\left( #1 \right)}
\starttext
The following equation contains probabilities.
\placeformula
\startformula
\P{A ∪ B} = \P{A} + \P{B} - \P{A ∩ B}
\stopformula
\stoptext
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