barchart with 3 Arguments

-----Original Message-----
From: falk.hilliges at twain-systems.com
Sent: Tue, 28 Aug 2012 08:05:47 -0700 (PDT)
To: r-help at r-project.org
Subject: [R] barchart with 3 Arguments

Hi @ all,
I have a problem concerning the barplot (barchart lattice) of a
dataframe. I
work with the attached dataframe.
When I try to plot this dataframe  I only get two rows plottet. When I
try
to plot the whole dataframe, there is message, that it is 'height' must
be a
vector or a matrix.
On the y-axis, the "amount_cattle" should be displayed and on the x-axis
the
"year" and the "country" so that I can compare the amount over the years
in
each country. Each country on the x-axis needs 4 bars (2000-2003).
I hope you can help me.
Thanks a lot
geophagus








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