will limits set in scale_colour_gradient() hide points beyond range? or use just gray color?

[Tengfei Yin]

Hi dear list,

on the on-line documents, in those annotation of the codes, it looks like points will not be plotted.

# Tweak scale limits.  Any points outside these limits will not be
# plotted, and will not affect the calculation of statistics, etc
d + scale_colour_gradient(limits=c(3, 10))

but following codes still keep those points outside the range, and it's in gray color

p <- qplot(wt, cyl, data = mtcars, colour = cyl)

p

## p + scale_colour_gradient(breaks = c(5.5, 6.5))

p + scale_colour_gradient(limits = c(5.5, 6.5))

Could anybody produce the same results?

Thanks

Tengfei

> sessionInfo()

R Under development (unstable) (2012-02-19 r58417)

Platform: x86_64-unknown-linux-gnu (64-bit)

locale:

 [1] LC_CTYPE=zh_CN.UTF-8       LC_NUMERIC=C              

 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    

 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   

 [7] LC_PAPER=C                 LC_NAME=C                 

 [9] LC_ADDRESS=C               LC_TELEPHONE=C            

[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:

[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:

[1] ggplot2_0.9.0

loaded via a namespace (and not attached):

 [1] colorspace_1.1-1   dichromat_1.2-4    digest_0.5.2       grid_2.15.0       

 [5] MASS_7.3-17        memoise_0.1        munsell_0.3        plyr_1.7.1        

 [9] proto_0.3-9.2      RColorBrewer_1.0-5 reshape2_1.2.1     scales_0.2.0      

[13] stringr_0.6  

--
Tengfei Yin
MCDB PhD student
1620 Howe Hall, 2274,
Iowa State University
Ames, IA,50011-2274
Homepage: www.tengfei.name

[Kohske Takahashi]

At the moment, you can surpress by:

p + scale_colour_gradient(limits = c(5.5, 6.5), na.value = NA)

again, here is some confusion in handling actual NA and out-of-range.
It will be fixed in the future version.

2012年4月1日18:08 Tengfei Yin <yinte...@gmail.com>:

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Kohske Takahashi <takahash...@gmail.com>

Research Center for Advanced Science and Technology,
The University of Tokyo, Japan.
http://www.fennel.rcast.u-tokyo.ac.jp/profilee_ktakahashi.html

[Tengfei Yin]

I see, thanks!