On 10/16/2011 05:26 PM, Alberto Alcalá Alvarez wrote:
hello, I'm trying to get the following done, using the xymatrix
command: I have a diagram with a >>--->> arrow going down, but the
tail of the arrow, >>, gets overlapped with the name of the origin of
the arrow, so my question is if there is a way to save some space
between the name of the origin and de tail of the arrow, or if I could
rescale the shaft of the arrow in order to make it shorter. thanks a lot!
Is this a standard commutative diagram? If it lies within the realm of
the CD macros from the AMS (amscd), I would use them. CD is limited to
rectangular arrays of objects, and non-diagonal arrows, but beyond that
you get real AMS-LaTeX arrows and spacing that should prevent that kind
of thing. The arrows on the xymatrix help file I found are cheesy.
They look to be formed from several characters, like we used to do when
we actually typed this stuff. The tail of your arrow is probably of
that sort (literally >>), and it is not correctly accounted for in
determining the spacing.
J. S. Milne has a nice guide to CD-type packages which might help.
http://www.jmilne.org/not/CDGuide.html
--
David L. Johnson
If all economists were laid end to end, they would not reach a
conclusion.
-- George Bernard Shaw
