[Xy-pic] \newdir

[Ross Moore]

Hi Michael,

On 27 Mar 2017, at 10:39, Michael Barr <barr at math.mcgill.ca<mailto:barr at math.mcgill.ca>> wrote:

Now I am really confused.  I tried the file you sent below and it didn't compile with an error that style file matrix not found.  So I changed {matrix} to [matrix] and got a message that \ar not defined.  So I changed [matrix] to [all] and it stopped with the following error message
! Xy-pic error: illegal <dir>: \dir { (} not defined.
\xyerror@ ...#2}\fi \errmessage {Xy-pic error: #1}
                                                  }
l.9   \xymatrix{A & B\\ C\ar@{{ (}->}[ur] & D }
                                               \qquad
?


Sorry,  it should start with

  \usepackage[barr,matrix]{xy}

to pick up the      \newdir{ (}{….}    command.
Then the variant   \newdir_{ (}{….}   can be defined also.

Think: "you cannot have a variant of something that isn’t yet defined".


I am using the 2016 version of TeXLive, if it matters.

Michael


Hope this helps.

Ross


Dr Ross Moore

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