Hi, For the last question, I?m trying to come up with a graphical representation of the changes in the maximum estimates generated by optimize() as the tolerance varies. For this, I?d like to have the greatest tolerance (the biggest number) on the left, and the smallest tolerance (smallest number) on the right. To complicate things further I?ve got the tolerances varying logarithmically rather than linearly: i.e. 10^n where n varies from (say) 1 to -4 in (say) 0.1 increments. Does anyone know how to re-label the x-axis so that it represents the tolerances in a correct and nice way? So far I?ve not been able to make complete sense of the examples I?ve seen that do this... Jon Minton -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.3/700 - Release Date: 24/02/2007 20:14 ------------------------------------------------------------------------ _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l