Re: [R] What are the color's name in heat.color(5)
Hi,
just one more note, col2rgb works for color codes as well:
(HC.m <- col2rgb(heat.colors(5)))
and to convert named colors to color codes, something like
tabl<-apply(col2rgb(colors()),2,function(x)do.call(rgb,c(as.list(x),alpha=255,maxColorValue=255)))
names(tabl)<-colors()
tabl
should work.
cheers
Am 28.03.2012 15:51, schrieb David Winsemius:
>
> On Mar 28, 2012, at 9:08 AM, Kevin Wright wrote:
>
>> They have hex RGB values instead of names:
>>
>> R> heat.colors(5)
>
>> [1] "#FFFF" "#FF5500FF" "#FFAA00FF" "#00FF" "#80FF"
>>
>> Kevin
>
> The first one is the same as 'red' as can be seen by parsing the RGB
> values above:
>
>> col2rgb("red")
> [,1]
> red255
> green0
> blue 0
>
> HC.m < matrix( c( strtoi( substr(heat.colors(5), 2,3), 16L),
> strtoi(substr(heat.colors(5), 4,5), 16L), strtoi(substr(heat.colors(5),
> 6,7), 16L) ), nrow=3, byrow=TRUE)
> HC.m
> [,1] [,2] [,3] [,4] [,5]
> [1,] 255 255 255 255 255
> [2,]0 85 170 255 255
> [3,]0000 128
>
> One of the others 'yellow' is also in named colors:
>
>> which( apply(col2rgb(colors()) , 2 , function(x) all( x ==
> c(HC.m[,2]))) )
> integer(0)
>> which( apply(col2rgb(colors()) , 2 , function(x) all( x ==
> c(HC.m[,3]))) )
> integer(0)
>> which( apply(col2rgb(colors()) , 2 , function(x) all( x ==
> c(HC.m[,1]))) )
> [1] 552 553
>> which( apply(col2rgb(colors()) , 2 , function(x) all( x ==
> c(HC.m[,4]))) )
> [1] 652 653
>> which( apply(col2rgb(colors()) , 2 , function(x) all( x ==
> c(HC.m[,5]))) )
> integer(0)
>
>> colors()[552: 553]
> [1] "red" "red1"
>
>> colors()[652:653]
> [1] "yellow" "yellow1"
>
--
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Re: [R] What are the color's name in heat.color(5)
On Mar 28, 2012, at 9:08 AM, Kevin Wright wrote:
They have hex RGB values instead of names:
R> heat.colors(5)
[1] "#FFFF" "#FF5500FF" "#FFAA00FF" "#00FF" "#80FF"
Kevin
The first one is the same as 'red' as can be seen by parsing the RGB
values above:
> col2rgb("red")
[,1]
red255
green0
blue 0
HC.m < matrix( c( strtoi( substr(heat.colors(5), 2,3), 16L),
strtoi(substr(heat.colors(5), 4,5), 16L),
strtoi(substr(heat.colors(5), 6,7), 16L) ), nrow=3, byrow=TRUE)
HC.m
[,1] [,2] [,3] [,4] [,5]
[1,] 255 255 255 255 255
[2,]0 85 170 255 255
[3,]0000 128
One of the others 'yellow' is also in named colors:
> which( apply(col2rgb(colors()) , 2 , function(x) all( x == c(HC.m[,
2]))) )
integer(0)
> which( apply(col2rgb(colors()) , 2 , function(x) all( x == c(HC.m[,
3]))) )
integer(0)
> which( apply(col2rgb(colors()) , 2 , function(x) all( x == c(HC.m[,
1]))) )
[1] 552 553
> which( apply(col2rgb(colors()) , 2 , function(x) all( x == c(HC.m[,
4]))) )
[1] 652 653
> which( apply(col2rgb(colors()) , 2 , function(x) all( x == c(HC.m[,
5]))) )
integer(0)
> colors()[552: 553]
[1] "red" "red1"
> colors()[652:653]
[1] "yellow" "yellow1"
--
David.
On Wed, Mar 28, 2012 at 7:24 AM, YN Kim wrote:
Hi all,
I'm trying to using heat.color function in my data visualization.
So, when
I set col = heat.color(5), five different colors are displayed from
red to
weak yellow.
But, now I want to know the color's keys or the names of the
displayed
heat.color. For instance, I think one of the five displayed colors
seems to
be 'red'. But, I'm not sure whether it is, also I don't know the
color
names for the others.
How can I know the exact colors name for that like 'red',
'darkyellow' and
so on?
Thanks.
YN
[[alternative HTML version deleted]]
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http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Kevin Wright
[[alternative HTML version deleted]]
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David Winsemius, MD
West Hartford, CT
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Re: [R] What are the color's name in heat.color(5)
They have hex RGB values instead of names: R> heat.colors(5) [1] "#FFFF" "#FF5500FF" "#FFAA00FF" "#00FF" "#80FF" Kevin On Wed, Mar 28, 2012 at 7:24 AM, YN Kim wrote: > Hi all, > > I'm trying to using heat.color function in my data visualization. So, when > I set col = heat.color(5), five different colors are displayed from red to > weak yellow. > > But, now I want to know the color's keys or the names of the displayed > heat.color. For instance, I think one of the five displayed colors seems to > be 'red'. But, I'm not sure whether it is, also I don't know the color > names for the others. > > How can I know the exact colors name for that like 'red', 'darkyellow' and > so on? > > Thanks. > > YN > >[[alternative HTML version deleted]] > > __ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Kevin Wright [[alternative HTML version deleted]] __ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
