I’m using tikz-cd for diagrams, and have a medium-sized diagram that I want to re-use several times. However, when I try using a definition like:

\newcommand{\myarrow}{$\begin{tikzcd} A \ar{r} & B \end{tikzcd}$

I get an error:

ERROR: Package pgfbasematrix Error: Single ampersand used with wrong catcode.

Is it possible to put a tikz-cd diagram into a defined command somehow?


It's a known problem with TikZ matrices:

  $\begin{tikzcd}[ampersand replacement=\&] A \ar{r} \& B \end{tikzcd}$}

The problem is that tikzpicture wants to do some juggling with the meaning of &, but it's impossible if the & has been found as the replacement text of a macro, as in your original definition. Happily, it provides the

ampersand replacement=...

key that allows to define some command as substitute for &, avoiding the need to do the jugglings.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.