[R] Greek letters and formatted text

From: Thomas Bschorr <bschorr_at_phys.ethz.ch>
Date: Sat, 05 Jun 2010 11:36:42 +0200


I desperately try to do s.th. like




where actually the greek letter should appear for Sigma. I have tried all sorts of combinations with expression and paste etc. but could not work it out. Maybe someone has an idea and can help me.

Thanks a lot+


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