L.S.-Soc&Gam

10. April 2016 um 02:33

Hi guys,

i've already searched the mailing list for this but i still am having a problem while trying to create a matrix.
my code looks like this:

\startformula
S=\left(\matrix{
  \sigma_x & \tau_{xy} & \tau_{xz} \cr
  \tau_{yx} & \sigma_y & \tau_{yz} \cr
    \tau_{zx} & \tau_{zy} & \sigma_z \cr
}\right)_{xyz}
\stopformula

But since a few days, there are only empty braces after compilation. The funny thing is, i worked already. but i've updated context at least once since (only 5 days ago, betas included) and since then after compiling there are only empty braces. When i enter

\startformula
S=\left(
1234
\right)_{xyz}
\stopformula

the 1234 shows fine between the braces. so it seems to have to do with \matrix command in some way...
i don't know any alternative way to create a matrix. any help would be appreciated.

Your code works fine here but I suggest to use ConTeXt’s own matrix environment.

\starttext

\startformula
S =    \startmathmatrix[left=\left(,right=\right)]
    \NC \sigma_{x} \NC \tau_{xy}  \NC \tau_{xz}  \NR
    \NC \tau_{yx}  \NC \sigma_{y} \NC \tau_{yz}  \NR
    \NC \tau_{zx}  \NC \tau_{zy}  \NC \sigma_{z} \NR
    \stopmathmatrix_{xyz}
\stopformula

\stoptext

Wolfgang

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