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Question: (Closed) Output the color code according to number
0
gravatar for 2012201024
3.6 years ago by
2012201024 • 20
China
2012201024 • 20 wrote:

Hi,

I want to get a series of color code, like #0000FF, according to a list of number. I can set a color scale in R heatmap and draw a picture, but how to get the code list of color?  Hope somebody help.

Thanks!
R • 1.2k views
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modified 3.6 years ago • written 3.6 years ago by 2012201024 • 20

Many thanks for your reply.

Furthermor, if I input a list like "1  3.5   4.5  9   2", and want to output the corresponding color code, according to a scale, how should I operate? 

ADD REPLY • link written 3.6 years ago by 2012201024 • 20

Hi- If you have a string like "1  3.5   4.5  9   2", then you have to split it and convert to numeric:

x<- "1  3.5   4.5  9   2"
xn<- as.numeric(strsplit(x, ' ')[[1]])
xn<- xn[!is.na(xn)] # Remove NAs

Then use xn as above for listOfNum.

(By the way, for clarifications like this use the "add comment" feature instead of posting it as an answer).

 

ADD REPLY • link written 3.6 years ago by dariober ♦ 9.2k

Hello 2012201024!

We believe that this post does not fit the main topic of this site.

This is not a Bioinformatics question.

For this reason we have closed your question. This allows us to keep the site focused on the topics that the community can help with.

If you disagree please tell us why in a reply below, we'll be happy to talk about it.

Cheers!

ADD REPLY • link modified 3.6 years ago • written 3.6 years ago by Sukhdeep Singh ♦ 9.3k

OK, Thank you for your advice.

In fact, I'm using graphlan to draw a metagenome picture, because the software don't provid color code of heatmap, so I should get them through this method.

Sorry about that.

ADD REPLY • link written 3.6 years ago by 2012201024 • 20
5
gravatar for dariober
3.6 years ago by
dariober ♦ 9.2k
Glasgow - UK
dariober ♦ 9.2k wrote:

Not sure I fully understand your question but let's see if this helps:

listOfNum<- 1:5
colour<- colorRampPalette(c("blue", "red"))(length(listOfNum))
colour
[1] "#0000FF" "#3F00BF" "#7F007F" "#BF003F" "#FF0000"
plot(listOfNum, col= colour, pch= 19, cex= 3)
ADD COMMENT • link modified 3.6 years ago • written 3.6 years ago by dariober ♦ 9.2k
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