Le 21.04.2006 10:48, Johan van Niekerk a écrit : > Dear All, > > I am trying to create a histogram-like plot for comparing two datasets - > For each interval, I want it to draw 2 bars - one for representing the > number of values in each dataset for that interval. > > I have looked at the help for the hist() function and also for the > histogram() function that is part of the lattice package, and neither > seem to support multiple datasets. > > Could someone please point me in the right direction? > > Kind regards, > Johan van Niekerk > Look there : http://addictedtor.free.fr/graphiques/search.php?q=histogram
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