[R] barchart in black & white with 10 categories?

[Fredrik Karlsson]

Dear list,

I am trying to plot  a barchart (from lattice) in B & W, with 10
categories per bar.
It seems that the colours are recycled after reachingcategory number
7, which creates a problem interpreting the chart. I therefore have
two questions:

1) How do I get more shades?

2) Does anyone have a theme to share with me with distinctive shades
in Black & White?


Thankful for all the help I can get.

/Fredrik