## how to use color sets in maps by defining intervals in matlab (for example: lower than 10 , between 10 and 50 , between 50 and 200, between 200 and 1000, greater than 1000). thanks

### mina massoud (view profile)

on 10 Apr 2019
Latest activity Answered by Kelly Kearney

on 10 Apr 2019

### Image Analyst (view profile)

how to use color sets in maps by defining intervals in matlab (for example: lower than 10 , between 10 and 50 , between 50 and 200, between 200 and 1000, greater than 1000). thanks

R2018b

### Image Analyst (view profile)

on 10 Apr 2019

Maybe like
cMap = zeros(1000, 3);
cMap(1:9, :) = [.4, .7, .3]; % Whatever color you want.
cMap(10:50, :) = [.8, .1, .6]; % Whatever color you want.
cMap(50:200, :) = [.6, .37, .8]; % Whatever color you want.
cMap(200:end, :) = [15, .2, .58]; % Whatever color you want.
colormap(cMap);
colorbar;

mina massoud

### mina massoud (view profile)

on 10 Apr 2019
thank you for risponding
but i mean if i have a matrix like this
C = [0 2 4 6; 8 10 12 14; 16 18 20 22];
imagesc(C)
colorbar
and i need to put intervals for the value of the matrix
like from [0:4] is a red color
[5:10] is blue color
[11:20] is green color
maggior than 20 is black
for example
thank you
Image Analyst

### Image Analyst (view profile)

on 10 Apr 2019
Try this:
C = [0 2 4 6; 8 10 12 14; 16 18 20 21]
imagesc(C)
colorbar
% and i need to put intervals for the value of the matrix
% like from [0:4] is a red color
% [5:10] is blue color
% [11:20] is green color
% maggior than 20 is black
cmap = zeros(22, 3);
cmap(1:5, :) = repmat([1, 0, 0], 5, 1); % 0 to 4 is red
cmap(6:11, :) = repmat([0, 0, 1], 6, 1); % 5 to 10 is blue.
cmap(12:21, :) = repmat([0, 1, 0], 10, 1); % 11 to 20 is green.
cmap(22, :) = [0, 0, 0]; % more than 20 is black.
colormap(cmap);
colorbar;
impixelinfo; % Let user mouse around and see image values.