myMapRGB2.m

function map = myMapRGB2(n_levels, varargin)
%function map = myMapRGB2(Z);
%paler colors than myMapRGB

brightness = 0.2;

while length(varargin) >= 2
  arg = varargin{1};
  val = varargin{2};  
  switch lower(arg)
    case 'brightness'
      brightness = val;
    otherwise
      error(['myMapRGB2: unknown option ', arg]);
  end 
  varargin = varargin(3:end);
end

%  n_levels = 65;
  n_2 = floor(n_levels/2);
  dx = (1- brightness)/n_2;
  r=[brightness:dx:1,ones(1,n_2)];
  g=[brightness:dx:1,1-dx:-dx:brightness];
  b=[ones(1,n_2),1:-dx:brightness];
  
  
  map = [r',g',b'];


% function map = myMapRGB2(n_contours, varargin)
% % myMapRGB2(Z) makes a red-white-blue colormap for the 2d-plots.
% %
% % RB, 20110713: now you can set hwo pale you want to have it! Default
% % min_val is now 0.2, this gives a bit brighter result. It used to be 0.5.
% %
% % There is a problem with the colorbar in Matlab. Use the test script below
% % to make sure that the colors and levels are correct.
% 
% brightness = 0.2;
% 
% while length(varargin) >= 2
%   arg = varargin{1};
%   val = varargin{2};  
%   switch lower(arg)
%     case 'brightness'
%       brightness = val;
%     otherwise
%       error(['myMapRGB2: unknown option ', arg]);
%   end 
%   varargin = varargin(3:end);
% end
% 
% n_2 = floor(n_contours/2);
% 
% dx = (1 - brightness)/n_2;
% r=[brightness:dx:1, ones(1,n_2)];
% g=[brightness:dx:1, 1-dx:-dx:brightness];
% b=[ones(1,n_2), 1:-dx:brightness];
% 
% map = [r',g',b'];
% 
% % 
% % % This script can be used to test if the colorbar is correct
% % % produce some data
% % x = linspace(-1, 1, 100);
% % y = linspace(-1, 1, 100);
% % 
% % x_axis = linspace(-1, 1, 100);
% % y_axis = linspace(-1, 1, 100);
% % 
% % [X, Y] = meshgrid(x, y);
% % 
% % data = X + Y;
% % 
% % % some variables
% % n_contours = 6; % number of contours
% % brightness = 0.2; % brightness
% % 
% % % make colormap
% % map = myMapRGB2(n_contours, brightness)
% % 
% % % make contourlevels 
% % [ca, level_list] = myCaxis2(data, n_contours)
% % 
% % % plot data 
% % figure(4),clf
% % contourf(x_axis, y_axis, data, level_list)
% % colormap(map)
% % colorbar()