"Henrique Dallazuanna" <[EMAIL PROTECTED]> wrote in
news:[EMAIL PROTECTED]:
> This works for me:
>
> x <- y <- seq(-4*pi, 4*pi, len=27)
> r <- sqrt(outer(x^2, y^2, "+"))
> library(lattice)
> levelplot(r, colorkey=list(col=gray((0:32)/32)),
> col.regions=(col=gray((0:32)/32)))
Works for me as well.
> 'r' is a matrix for you?
It was the vector created by the first levelplot() example. I had not
run the code of Megh Dal.
When I hastily looked at the help page and saw that "colorkey" was
supposed to be a logical, I assumed that the list argument was throwing
the error. If I had read the full text I would have seen that a list
argument was also valid. This gives what appears to me to be identical
success, but maybe it has risks that I don't understand:
levelplot(r, colorkey=TRUE,
col.regions=(col=gray((0:32)/32)))
Thanks;
David Winsemius
>
> On 01/03/2008, David Winsemius <[EMAIL PROTECTED]> wrote:
>> "Henrique Dallazuanna" <[EMAIL PROTECTED]> wrote in
>> news:[EMAIL PROTECTED]:
>>
>> library(lattice)
>> levelplot(r, colorkey=list(col=gray((0:32)/32)),
>> col.regions=(col=gray((0:32)/32)))
>>
>> When I try that example, I get an error, even after updating
>> lattice.
>>
>> > levelplot(r, colorkey=list(col=gray((0:32)/32)),
>> + col.regions=(col=gray((0:32)/32)))
>> Error in UseMethod("levelplot") : no applicable method for
>> "levelplot"
>>
>> If I simply change colorkey=FALSE to colorkey=TRUE in the first
>> level
> plot
>> help page example, I have what looks to me as "success".
>>
>> levelplot(z~x*y, grid, cuts = 50, scales=list(log="e"), xlab="",
>> ylab="", main="Weird Function", sub="with log scales",
>> colorkey = TRUE,
>> region = TRUE)
>>
>> --
>> David Winsemius
>>
>> >
>> > On 29/02/2008, Megh Dal <[EMAIL PROTECTED]> wrote:
>> >> Hi Jim, i think you could not get my point. I did not want to
>> >> put red-blue color there. I want to put a pallet which will
>> >> describe the values of r. please have a look on following :
>> > http://bp0.blogger.com/_k3l6qPzizGs/RvDVglPknRI/AAAAAAAAAKo/itlWOv
>> > uuO tI/s1600-h/pairwise_kl_window60.png. Please see how a color
>> > pallate is added on the right side of this plot describing the
>> > value of red color, value of blue color etc.
>> >>
>> >> Is there any solution?
>> >>
>> >> Regards,
>> >>
>> >>
>> >> jim holtman <[EMAIL PROTECTED]> wrote:
>> >> Try something like this:
>> >>
>> >> require(grDevices) # for colours
>> >> x <- y <- seq(-4*pi, 4*pi, len=27)
>> >> r <- sqrt(outer(x^2, y^2, "+"))
>> >> image(x, y, r, col=gray((0:32)/32))
>> >> colors <- colorRampPalette(c('red', 'yellow', 'blue')) # create
>> >> you color spectrum
>> >> image(x,y,r, col=colors(100))
>> >>
>> >>
>> >>
>> >> On Thu, Feb 28, 2008 at 9:28 PM, Megh Dal wrote:
>> >> > I used ?image function to do that, like below :
>> >> >
>> >> > require(grDevices) # for colours
>> >> > x <- y <- seq(-4*pi, 4*pi, len=27)
>> >> > r <- sqrt(outer(x^2, y^2, "+"))
>> >> > image(x, y, r, col=gray((0:32)/32))
>> >> >
>> >> > However my next problem to add a color pallet for color
>> >> > description [as shown in following link]. If anyone here tell
>> >>>> me how to do that, it will be good for me.
>> >> >
>> >>
>> >> > Megh Dal wrote: Hi all,
>> >>
>> >> >
>> >> > Can anyone here please tell me whether is it possible to
>> >> > produce a chart displayed in
>> >> > http://www.datawolf.blogspot.com/ in R for
>> > visualizing multivariate time series? If possible how?
>> >> >
>> >> >
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.h
> tml
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
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