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Multi plots in a page gridExtra package …
http://diy-leds.fr/select2/dropdown/selectonclose Multi plots in a page gridExtra package makes it easier to put multiple plots generated by ggplot2 in a page equivalent to par(mfrow= ). Example: http://code.google.com/p/gridextra/wiki/arrange came across through a conversation in StackOverflow http://stackoverflow.com/questions/1249548/side-by-side-plots-with-ggplot2-in-r
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How to select the first/least/max row pe …
http://alezane-villandry.fr/322-au-revoir-fabuleuse How to select the first/least/max row per group in SQL A nice explanation about the subject. Easy to understand. http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/