Please don't use 'assert' in R packages. If called, this means that an error in your code aborts the whole R process, including your user's work. I see several R packages doing this, and one of them called 'assert' on me earlier in the week.
We provide 'error': please do use it to return control to the user when your code misbehaves. Similarly 'exit' and 'abort' should never be used in R packages. Sometimes it is not under your control: I sometimes see an rgl failure at R: indirect_vertex_array.c:659: emit_DrawArrays_old: Assertion `elements_per_request >= count' failed. that is coming from the Mesa GL libraries. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel