Mathtext spacing

Community matplotlib-users
1

I just downloaded the latest matplotlib (0.63.4) for Windows XP. I got rid of my font cache to make sure they would be re-generated. I have two questions/issues:

1) The font cache was not re-created, for some reason.

2) The spacing in math text does not seem to be rendered. I may be doing something wrong. I have tried this in both the TkAgg and GTKAgg backends. If i modify the example script mathtext_demo.py so the line

title(r'$\Delta_i^j \hspace{0.4} \rm{versus} \hspace{0.4} \Delta_{i+1}^j$', fontsize=20)

becomes

title(r'$\Delta_i^j \hspace{0.4} \rm{versus some} \hspace{0.4} \Delta_{i+1}^j$', fontsize=20)

the space between 'versus' and 'some' is not rendered on my machine.

If you have any idea why that is, i'd be very grateful.
Thanks,
Dominique

2

That's the normal behavior of TeX math-mode. I believe you want:

   \rm{versus \ some}

--Matt

···

On Fri, 1 Oct 2004, Dominique Orban wrote:

I just downloaded the latest matplotlib (0.63.4) for Windows XP. I got
rid of my font cache to make sure they would be re-generated. I have two
questions/issues:

1) The font cache was not re-created, for some reason.

2) The spacing in math text does not seem to be rendered. I may be doing
something wrong. I have tried this in both the TkAgg and GTKAgg
backends. If i modify the example script mathtext_demo.py so the line

title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus\} \\hspace\{0\.4\} \\Delta\_\{i\+1\}^j', fontsize=20)

becomes

title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus some\} \\hspace\{0\.4\} \\Delta\_\{i\+1\}^j', fontsize=20)

the space between 'versus' and 'some' is not rendered on my machine.

3

Hi,

I cannot build matplotlib-0.63.4 on gentoo linux. The error I get when running
python setup.py build is:

running build_ext
building 'matplotlib._na_transforms' extension
creating build/temp.linux-i686-2.3
creating build/temp.linux-i686-2.3/src
creating build/temp.linux-i686-2.3/CXX
gcc -fno-strict-aliasing -DNDEBUG -fPIC -Isrc -I. -I/usr/include/python2.3 -c
CXX/IndirectPythonInterface.cxx -o
build/temp.linux-i686-2.3/CXX/IndirectPythonInterface.o -DNUMARRAY=1
gcc -fno-strict-aliasing -DNDEBUG -fPIC -Isrc -I. -I/usr/include/python2.3 -c
CXX/cxxsupport.cxx -o build/temp.linux-i686-2.3/CXX/cxxsupport.o -DNUMARRAY=1
In file included from CXX/cxxsupport.cxx:6:
./CXX/Objects.hxx: In constructor
`Py::MapBase<T>::const_iterator::const_iterator(const Py::MapBase<T>*,
Py::List, Py::SeqBase<Py::Object>::iterator)':
./CXX/Objects.hxx:2271: error: `s' undeclared (first use this function)
./CXX/Objects.hxx:2271: error: (Each undeclared identifier is reported only
once for each function it appears in.)
error: command 'gcc' failed with exit status 1

I have python 2.3.3, GCC 3.4.2, Numeric 23.3, numarray 1.0, pygtk-2.3.97 (I
ungraded from pygtk-2.2.0 but that did not help), and wxpython-2.4.2.4

I hope that is enough information - do I have the wrong versions - or am I
missing something - I had no trouble building matplotlib-0.62.x

Cheers
Chris

4

Quoting Matt Newville <newville@...189...>:

···

On Fri, 1 Oct 2004, Dominique Orban wrote:

> I just downloaded the latest matplotlib (0.63.4) for Windows XP. I got
> rid of my font cache to make sure they would be re-generated. I have two
> questions/issues:
>
> 1) The font cache was not re-created, for some reason.
>
> 2) The spacing in math text does not seem to be rendered. I may be doing
> something wrong. I have tried this in both the TkAgg and GTKAgg
> backends. If i modify the example script mathtext_demo.py so the line
>
> title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus\} \\hspace\{0\.4\} &gt; \\Delta\_\{i\+1\}^j', fontsize=20)
>
> becomes
>
> title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus some\} \\hspace\{0\.4\} &gt; \\Delta\_\{i\+1\}^j', fontsize=20)
>
> the space between 'versus' and 'some' is not rendered on my machine.

That's the normal behavior of TeX math-mode. I believe you want:

   \rm{versus \ some}

Certainly, my example was giving the expected result (i.e. with spacing) in
older versions of matplotlib. If the argument of \rm{} were to be interpreted
as math mode, it would appear as an equation where the variables v, e, r, s, u,
s, s, o, m and e are multiplied together. It doesn't.

Dominique

5

Hi Dominique,

> > title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus\} \\hspace\{0\.4\} &gt; &gt; \\Delta\_\{i\+1\}^j', fontsize=20)
> >
> > becomes
> >
> > title(r'\\Delta\_i^j \\hspace\{0\.4\} \\rm\{versus some\} \\hspace\{0\.4\} &gt; &gt; \\Delta\_\{i\+1\}^j', fontsize=20)
> >
> > the space between 'versus' and 'some' is not rendered on my machine.
>
> That's the normal behavior of TeX math-mode. I believe you want:
>
> \rm{versus \ some}

Certainly, my example was giving the expected result (i.e. with
spacing) in older versions of matplotlib. If the argument of
\rm{} were to be interpreted as math mode, it would appear as an
equation where the variables v, e, r, s, u, s, s, o, m and e are
multiplied together. It doesn't.

Hmm.... For me, mathtext renders your expression as latex does
(except that with latex \hspace needs units and the resulting
\Delta looks a bit less slanted). The result does appear to
include the product of variables v,e,r,s,u,s,s,o,m, and e. The
variables are set in a roman font, but are still in math mode.

I can't tell if you're getting or *expecting* different results
from what latex gives. All I can say is that mathtext seems to
behave correctly (ie, closing emulating latex) for me. I would've
sworn this was the behavior of recent versions of mathtext, but
perhaps it has not always been this way.

IMHO, I think the decision to closely emulate TeX for math
typesetting was billiant, and that the implementation is amazing.

--Matt