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## Red Blue Colormap

version 1.0.0.0 (1.47 KB) by Adam Auton

A colormap from bright blue, through white, and then to bright red.

Updated 09 Oct 2009

REDBLUE(M), is an M-by-3 matrix that defines a colormap.
The colors begin with bright blue, range through shades of blue to white, and then through shades of red to bright red. REDBLUE, by itself, is the same length as the current figure's colormap.

Xue CHEN

matt majic

Lindsay Sheridan

Kevin Bryant

Xb Zzzh

### Xb Zzzh (view profile)

great function~ It really helps

anasuya barik

### anasuya barik (view profile)

Elizabeth Wraback

Nikita Sandaliuk

Michael Jones

Anna Titova

MINYI DAI

Ryo Pratama

Avishek Paul

Feng

Shengyan Liu

Wei-Heng Hsu

Antonio

Shane L

smsinks

Great

Mathew Owens

### Mathew Owens (view profile)

For those asking questions, simply put the .m file in a directory in your Matlab path, then run

colormap('redblue')

Richard Fightmaster

### Richard Fightmaster (view profile)

I typed in "redblue" and it seemed to work but nothing came up in the "figure 1".

Paméla Didier

### Paméla Didier (view profile)

I am sorry, I am not a pro of Matlab. Can you explain how to use this function?

nathan q

### nathan q (view profile)

Babette Christelle Tchonang

### Babette Christelle Tchonang (view profile)

thanks a lot for the this range of colorbar

Yu-Lin Tsai

### Yu-Lin Tsai (view profile)

Very useful and helpful to my figure! Thanks!

Gery Mandala

Liaofan Lin

Great!

EsniX

### EsniX (view profile)

great colormap

Stephen Cobeldick

### Stephen Cobeldick (view profile)

@Rob Campbell: a good idea, but that code give the wrong length output if |m| is odd. Here is one possible fix:

n = fix(m/2);
x = n~=(m/2);
r = [(0:1:n-1)/n,ones(1,n+x)];
g = [(0:1:n-1)/n,ones(1,x),(n-1:-1:0)/n];
b = [ones(1,n+x),(n-1:-1:0)/n];
c = [r(:),g(:),b(:)];

Felipe Orellana

### Felipe Orellana (view profile)

Thanks a lot dude. I appreciate your effort.

thank you very much,

Felipe

chsharrison

### chsharrison (view profile)

Just what I was looking for

Mathias Vanwolleghem

Rob Campbell

### Rob Campbell (view profile)

Thankyou: nice colormap. What do you think of this? A neater way to obtain c:

n = fix(0.5*m);
r = [(0:1:n-1)/n,ones(1,n)];
g = [(0:n-1)/n, (n-1:-1:0)/n];
b = [ones(1,n),(n-1:-1:0)/n];
c = [r(:), g(:), b(:)];

Xianmin

### Xianmin (view profile)

The function "colormapeditor" from MATLAB will be helpful to customizer the colormap

##### MATLAB Release Compatibility
Created with R2008b
Compatible with any release
##### Platform Compatibility
Windows macOS Linux