# mathtext : overrightarrow

Hi,

is there any way to display a big arrow on a vector using mathtext, like "$\overrightarrow{AB}$" ?

If not, is there any plan to implement it in a next release ?

Thanks a lot,

Nicolas P.

Handling this like an accent is trivial, and handled with the patch below (which I will commit to SVN).

Handling this in such a way that the length of the arrow changes based on the size of the underlying text is less straightforward and will take some time to implement.

Cheers,
Mike

Index: lib/matplotlib/mathtext.py

···

===================================================================
--- lib/matplotlib/mathtext.py (revision 7148)
+++ lib/matplotlib/mathtext.py (working copy)
@@ -2445,7 +2445,9 @@
r"'" : r'\combiningacuteaccent',
r'~' : r'\combiningtilde',
r'.' : r'\combiningdotabove',
- r'^' : r'\circumflexaccent'
+ r'^' : r'\circumflexaccent',
+ r'overrightarrow' : r'\rightarrow',
+ r'overleftarrow' : r'\leftarrow'
}
_wide_accents = set(r"widehat widetilde".split())

Nicolas Pourcelot wrote:

Hi,

is there any way to display a big arrow on a vector using mathtext, like "$\overrightarrow{AB}$" ?

If not, is there any plan to implement it in a next release ?

Thanks a lot,

Nicolas P.

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Michael Droettboom a �crit :

Handling this like an accent is trivial, and handled with the patch below (which I will commit to SVN).

It is however not so much useful, since \vec does already the job.

Handling this in such a way that the length of the arrow changes based on the size of the underlying text is less straightforward and will take some time to implement.

This is what I meant, yes.
Hope you will success, I miss it quite a lot for now.

Thanks again,

Nicolas

···

Cheers,
Mike

# Index: lib/matplotlib/mathtext.py

--- lib/matplotlib/mathtext.py (revision 7148)
+++ lib/matplotlib/mathtext.py (working copy)
@@ -2445,7 +2445,9 @@
r"'" : r'\combiningacuteaccent',
r'~' : r'\combiningtilde',
r'.' : r'\combiningdotabove',
- r'^' : r'\circumflexaccent'
+ r'^' : r'\circumflexaccent',
+ r'overrightarrow' : r'\rightarrow',
+ r'overleftarrow' : r'\leftarrow'
}

_wide_accents = set(r"widehat widetilde".split())

Nicolas Pourcelot wrote:

Hi,

is there any way to display a big arrow on a vector using mathtext, like "$\overrightarrow{AB}$" ?

If not, is there any plan to implement it in a next release ?

Thanks a lot,

Nicolas P.

------------------------------------------------------------------------------

Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet
the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp as they present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com _______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Nicolas Pourcelot wrote:

Michael Droettboom a �crit :

Handling this like an accent is trivial, and handled with the patch below (which I will commit to SVN).

It is however not so much useful, since \vec does already the job.

The rightarrow is longer than vec. Much more suitable for multiple letters underneath.

Handling this in such a way that the length of the arrow changes based on the size of the underlying text is less straightforward and will take some time to implement.

This is what I meant, yes.
Hope you will success, I miss it quite a lot for now.

I'll get to this when I have the time.

Cheers,
Mike

···

Cheers,
Mike

# Index: lib/matplotlib/mathtext.py

--- lib/matplotlib/mathtext.py (revision 7148)
+++ lib/matplotlib/mathtext.py (working copy)
@@ -2445,7 +2445,9 @@
r"'" : r'\combiningacuteaccent',
r'~' : r'\combiningtilde',
r'.' : r'\combiningdotabove',
- r'^' : r'\circumflexaccent'
+ r'^' : r'\circumflexaccent',
+ r'overrightarrow' : r'\rightarrow',
+ r'overleftarrow' : r'\leftarrow'
}

_wide_accents = set(r"widehat widetilde".split())

Nicolas Pourcelot wrote:

Hi,

is there any way to display a big arrow on a vector using mathtext, like "$\overrightarrow{AB}$" ?

If not, is there any plan to implement it in a next release ?

Thanks a lot,

Nicolas P.

------------------------------------------------------------------------------

Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet
the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp as they present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com _______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users