Dear Hans

Thanks for your quick answer! I was however not able to produce the graph with the textext code... Should I actually then use another compiler? I tried with context and texexec (I thought texexec is the compiler for mkiv, right? I'm on linux ubuntu).

I saw also that, as you mention, context has a \frac: http://wiki.contextgarden.net/Math_with_newmat

I tried then to simply add \usemodule[newmat] and compile with context, but did not work... Code below, error message below below...

Thanks a  lot!!!!

Matthieu

Code:

\usemodule[newmat]

\starttext

\setupMPpage[offset=1pt]

\switchtobodyfont[10pt]

% Beginning MetaPost graphic

\startMPpage

label.top(btex 1.4 etex scaled   1.00, (10, 10));

label.top(btex $\sigma_t$ etex scaled   1.00, (0, 10));

label.top(btex $\displaystyle \frac{\sigma_t}{a}$ etex scaled   1.00, (0, 10));

\stopMPpage

\stoptext





Error:

! Math error: parameter \Umathfraction_del_size\displaystyle is not set.
l.3 ...t{411}{$\displaystyle \frac {\sigma _t}{a}$
                                                  }
<inserted text> ...ore.mp ; fi ; ;;;]===], false)}

\processMPgraphic ...s ;\!!es , \MPaskedfigure )}}
\egroup \global \MPinstanc...
\dostartMPpage ...??mg ][#1]\processMPgraphic {#3}
                                                  \dostopfittingpage
l.26 \stopMPpage




Le 26/04/2011 10:37, Hans Hagen a écrit :
On 25-4-2011 8:33, mat wrote:

Any idea how I should do? Find below minimal example, that does not work
on my computer when compiling with context...

best use textext ...

label.top(textext("1.4") scaled 1.00, (10, 10)); label.top(textext("$\sigma_t$") scaled 1.00, (0, 10)); label.top(textext("$\displaystyle \frac{\sigma_t}{a}$") scaled 1.00, (1, 1));

works ok (only tested mkiv); also \frac is available in context

Hans


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