Dear R Users,

I have a basis question regarding the use of color in the lattice package. I
read the ?barchart help page and searched the R archives but could not
understand how to do it.

I just need to plot a barchart using specific colors for my groups, e.g.
green and red instead of the default lattice colors. How do I do that?

If I say:
    barchart(x ~ a_factor, groups=my_groups, data=my_data, col=c('green',
'red'), auto.key=TRUE)

then my barplot has the correct colors, but the legend does not. What is the
correct approach to set colors in barchart?

Thanks
Alex

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