[R] How can I draw bars

[Jim Lemon]

Raymond Balise wrote:
> I need to make a graphic to show problems on different parts of
> chromosomes (think of a graphic showing the number of frayed threads
> as colors along different parts of a worn out rope).  I want to draw
> bars going from left to right across a page and color different parts
> of the bars in different shades.  Each graphic will need to have
> several bars of different lenghts corresponding to the different
> lenghts of the chromsomes.
>
> Is there a package around that can help me draw custom bars of
> different colors?  I am a hardcore SAS guy who is just learning R so I
> am mostly clueless.
>   
Hi Raymond,
The gradient.rect and color.scale functions (in plotrix) may not do 
exactly what you want, but the code within them is almost certainly 
relevant to your problem.

Jim