[R] filled bars with patterns
a.mueller at icrf.icnet.uk
Fri Mar 15 17:55:50 CET 2002
thanks for the hint, the workaround below works fine. I'll also file a
bug report on the density stuff in the legend call.
Paul Murrell wrote:
> > I'd also like to have the filled boxes in the legend to be striped. The
> > legend function has a 'density' attribute, but unfortunately this does't
> > seem to do anything
> > following the above example
> > legend(3.4, 5, c('Axx','Bxx','Cxx','Dxx'), fill = c('red', 'blue',
> > 'green', 'orange'))
> > is the same as
> > legend(3.4, 5, c('Axx','Bxx','Cxx','Dxx'), density=10, fill = c('red',
> > 'blue', 'green', 'orange'),
> > density=c(10,-1,20, 200))
> This appears to be a bug. Can you file a bug report for this please?
> > In the above example R warns that 'border' is not used yet. Does that
> > change soon? Basically I'd like the border of each bar to be black
> > rather than the fill color.
> I'm not sure when this might get implemented properly -- in the meantime,
> here's a small extension of the example that will "cheat" to give the effect
> I think you want ...
> m <- matrix(runif(30), ncol=5)
> barplot(m, beside=FALSE, col=rep(c("white", "light green", "pink"), 2),
> xlim=c(0, 6), axes=FALSE)
> barplot(m, beside=FALSE, col="blue",
> density=rep(c(10, 5, -1), 2),
> angle=rep(c(45, -45, 0), 2), horiz=TRUE,
> xlim=c(0, 6))
> barplot(m, beside=FALSE, col="black", density=-1,
> xlim=c(0, 6))
> > However, isn't it a logic step to implement the density attribute of the
> > barplot in a way that one can mix filled bars with stiped bars? E.g
> > barplot(..., besides = FALSE, horiz = TRUE, col = c('red', 'blue',
> > 'green', 'orange'),
> > density = c(-1,0,-1,10))
> > where a density value of 0 means no density AND no filling (empty, just
> > border), a negative value means complete filling with no stipes and a
> > positve value means actually stiping with that density valie.
> There are a number of places in R where several graphics parameters interact
> with each other in a nasty way. Suggestions for clarifications like this
> are very welcome. But even better would be a patch for the barplot code
> that implemented the change :)
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