CODEWITHSUNDEEP
r
Mannat M
Mannat M

Reputation: 177

defining custom color pallete in R

Hey I want to create my own custom palette of color in R using the brewer.pal() function. And then I want to view it using the image function.

 ny<-brewer.pal(7,"Blues")
 image(x=1:7,y=1,z=as.matrix(1:7),col=ny)

This code gives 7 shdes of blue, however i want to give my own choice of 7 different colors.

image(x=1:7,y=1,z=as.matrix(1:7),col=c("Reds","Blues"))

I thought of trying this function, but its obvious wrong. Can someone please help me. I specifically want to use the brewer.pal() and image() funcions

Upvotes: 2

Views: 545

Answers (2)

Tad Dallas
Tad Dallas

Reputation: 1189

If you'd prefer a gradient between 2+ colors of your choosing, you could also use colorRampPalette 

   pretty = colorRampPalette(c('#EF6780', '#80ef67', '#6780ef'))
   image(x=1:7,y=1,z=as.matrix(1:7),col=pretty(200))

Upvotes: 2

alexwhitworth
alexwhitworth

Reputation: 4907

You can specify colors as hexadecimal colors in R. For example

image(x=1:7,y=1,z=as.matrix(1:7),col= "#CC6666")

References:
http://www.color-hex.com/
http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/

Upvotes: 1

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