[R] Question about Density Plot

[Ignacio Ibarra Del Río]

  Hi

I've attached an example about something I want to do in R. This example 
was done in a Fortran application called ASGL. Here's an example in 
matplotlib

http://matplotlib.sourceforge.net/examples/pylab_examples/hexbin_demo.html

Basically, it's like a scatter plot, but have several additional things. 
One thing are the grids inside the graph, and the other is a density bar 
used as a reference to evaluate the frequency of the points.

The command that I've always used in R for scatter plots is.

 > plot(l1, l2)

I need to know if there is something similar in a library of R, or if I 
could implement it on my own.

Greetings

Ignacio
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