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| 1 | +function lineStyles=linspecer(N,varargin) |
| 2 | +% function lineStyles = linspecer(N) |
| 3 | +% This function creates an Nx3 array of N [R B G] colors |
| 4 | +% These can be used to plot lots of lines with distinguishable and nice |
| 5 | +% looking colors. |
| 6 | +% |
| 7 | +% lineStyles = linspecer(N); makes N colors for you to use: lineStyles(ii,:) |
| 8 | +% |
| 9 | +% colormap(linspecer); set your colormap to have easily distinguishable |
| 10 | +% colors and a pleasing aesthetic |
| 11 | +% |
| 12 | +% lineStyles = linspecer(N,'qualitative'); forces the colors to all be distinguishable (up to 12) |
| 13 | +% lineStyles = linspecer(N,'sequential'); forces the colors to vary along a spectrum |
| 14 | +% |
| 15 | +% % Examples demonstrating the colors. |
| 16 | +% |
| 17 | +% LINE COLORS |
| 18 | +% N=6; |
| 19 | +% X = linspace(0,pi*3,1000); |
| 20 | +% Y = bsxfun(@(x,n)sin(x+2*n*pi/N), X.', 1:N); |
| 21 | +% C = linspecer(N); |
| 22 | +% axes('NextPlot','replacechildren', 'ColorOrder',C); |
| 23 | +% plot(X,Y,'linewidth',5) |
| 24 | +% ylim([-1.1 1.1]); |
| 25 | +% |
| 26 | +% SIMPLER LINE COLOR EXAMPLE |
| 27 | +% N = 6; X = linspace(0,pi*3,1000); |
| 28 | +% C = linspecer(N) |
| 29 | +% hold off; |
| 30 | +% for ii=1:N |
| 31 | +% Y = sin(X+2*ii*pi/N); |
| 32 | +% plot(X,Y,'color',C(ii,:),'linewidth',3); |
| 33 | +% hold on; |
| 34 | +% end |
| 35 | +% |
| 36 | +% COLORMAP EXAMPLE |
| 37 | +% A = rand(15); |
| 38 | +% figure; imagesc(A); % default colormap |
| 39 | +% figure; imagesc(A); colormap(linspecer); % linspecer colormap |
| 40 | +% |
| 41 | +% See also NDHIST, NHIST, PLOT, COLORMAP, 43700-cubehelix-colormaps |
| 42 | +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 43 | +% by Jonathan Lansey, March 2009-2013 – Lansey at gmail.com % |
| 44 | +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 45 | +% |
| 46 | +%% credits and where the function came from |
| 47 | +% The colors are largely taken from: |
| 48 | +% http://colorbrewer2.org and Cynthia Brewer, Mark Harrower and The Pennsylvania State University |
| 49 | +% |
| 50 | +% |
| 51 | +% She studied this from a phsychometric perspective and crafted the colors |
| 52 | +% beautifully. |
| 53 | +% |
| 54 | +% I made choices from the many there to decide the nicest once for plotting |
| 55 | +% lines in Matlab. I also made a small change to one of the colors I |
| 56 | +% thought was a bit too bright. In addition some interpolation is going on |
| 57 | +% for the sequential line styles. |
| 58 | +% |
| 59 | +% |
| 60 | +%% |
| 61 | + |
| 62 | +%function lineStyles=linspecer(N,varargin) |
| 63 | + |
| 64 | +if nargin==0 % return a colormap |
| 65 | + lineStyles = linspecer(128); |
| 66 | + return; |
| 67 | +end |
| 68 | + |
| 69 | +if ischar(N) |
| 70 | + lineStyles = linspecer(128,N); |
| 71 | + return; |
| 72 | +end |
| 73 | + |
| 74 | +if N<=0 % its empty, nothing else to do here |
| 75 | + lineStyles=[]; |
| 76 | + return; |
| 77 | +end |
| 78 | + |
| 79 | +% interperet varagin |
| 80 | +qualFlag = 0; |
| 81 | +colorblindFlag = 0; |
| 82 | + |
| 83 | +if ~isempty(varargin)>0 % you set a parameter? |
| 84 | + switch lower(varargin{1}) |
| 85 | + case {'qualitative','qua'} |
| 86 | + if N>12 % go home, you just can't get this. |
| 87 | + warning('qualitiative is not possible for greater than 12 items, please reconsider'); |
| 88 | + else |
| 89 | + if N>9 |
| 90 | +% warning(['Default may be nicer for ' num2str(N) ' for clearer colors use: whitebg(''black''); ']); |
| 91 | + end |
| 92 | + end |
| 93 | + qualFlag = 1; |
| 94 | + case {'sequential','seq'} |
| 95 | + lineStyles = colorm(N); |
| 96 | + return; |
| 97 | + case {'white','whitefade'} |
| 98 | + lineStyles = whiteFade(N);return; |
| 99 | + case 'red' |
| 100 | + lineStyles = whiteFade(N,'red');return; |
| 101 | + case 'blue' |
| 102 | + lineStyles = whiteFade(N,'blue');return; |
| 103 | + case 'green' |
| 104 | + lineStyles = whiteFade(N,'green');return; |
| 105 | + case {'gray','grey'} |
| 106 | + lineStyles = whiteFade(N,'gray');return; |
| 107 | + case {'colorblind'} |
| 108 | + colorblindFlag = 1; |
| 109 | + otherwise |
| 110 | + warning(['parameter ''' varargin{1} ''' not recognized']); |
| 111 | + end |
| 112 | +end |
| 113 | +% *.95 |
| 114 | +% predefine some colormaps |
| 115 | + set3 = colorBrew2mat({[141, 211, 199];[ 255, 237, 111];[ 190, 186, 218];[ 251, 128, 114];[ 128, 177, 211];[ 253, 180, 98];[ 179, 222, 105];[ 188, 128, 189];[ 217, 217, 217];[ 204, 235, 197];[ 252, 205, 229];[ 255, 255, 179]}'); |
| 116 | +set1JL = brighten(colorBrew2mat({[228, 26, 28];[ 55, 126, 184]; [ 77, 175, 74];[ 255, 127, 0];[ 255, 237, 111]*.85;[ 166, 86, 40];[ 247, 129, 191];[ 153, 153, 153];[ 152, 78, 163]}')); |
| 117 | +set1 = brighten(colorBrew2mat({[ 55, 126, 184]*.85;[228, 26, 28];[ 77, 175, 74];[ 255, 127, 0];[ 152, 78, 163]}),.8); |
| 118 | + |
| 119 | +% colorblindSet = {[215,25,28];[253,174,97];[171,217,233];[44,123,182]}; |
| 120 | +colorblindSet = {[215,25,28];[253,174,97];[171,217,233]*.8;[44,123,182]*.8}; |
| 121 | + |
| 122 | +set3 = dim(set3,.93); |
| 123 | + |
| 124 | +if colorblindFlag |
| 125 | + switch N |
| 126 | + % sorry about this line folks. kind of legacy here because I used to |
| 127 | + % use individual 1x3 cells instead of nx3 arrays |
| 128 | + case 4 |
| 129 | + lineStyles = colorBrew2mat(colorblindSet); |
| 130 | + otherwise |
| 131 | + colorblindFlag = false; |
| 132 | + warning('sorry unsupported colorblind set for this number, using regular types'); |
| 133 | + end |
| 134 | +end |
| 135 | +if ~colorblindFlag |
| 136 | + switch N |
| 137 | + case 1 |
| 138 | + lineStyles = { [ 55, 126, 184]/255}; |
| 139 | + case {2, 3, 4, 5 } |
| 140 | + lineStyles = set1(1:N); |
| 141 | + case {6 , 7, 8, 9} |
| 142 | + lineStyles = set1JL(1:N)'; |
| 143 | + case {10, 11, 12} |
| 144 | + if qualFlag % force qualitative graphs |
| 145 | + lineStyles = set3(1:N)'; |
| 146 | + else % 10 is a good number to start with the sequential ones. |
| 147 | + lineStyles = cmap2linspecer(colorm(N)); |
| 148 | + end |
| 149 | + otherwise % any old case where I need a quick job done. |
| 150 | + lineStyles = cmap2linspecer(colorm(N)); |
| 151 | + end |
| 152 | +end |
| 153 | +lineStyles = cell2mat(lineStyles); |
| 154 | + |
| 155 | +end |
| 156 | + |
| 157 | +% extra functions |
| 158 | +function varIn = colorBrew2mat(varIn) |
| 159 | +for ii=1:length(varIn) % just divide by 255 |
| 160 | + varIn{ii}=varIn{ii}/255; |
| 161 | +end |
| 162 | +end |
| 163 | + |
| 164 | +function varIn = brighten(varIn,varargin) % increase the brightness |
| 165 | + |
| 166 | +if isempty(varargin), |
| 167 | + frac = .9; |
| 168 | +else |
| 169 | + frac = varargin{1}; |
| 170 | +end |
| 171 | + |
| 172 | +for ii=1:length(varIn) |
| 173 | + varIn{ii}=varIn{ii}*frac+(1-frac); |
| 174 | +end |
| 175 | +end |
| 176 | + |
| 177 | +function varIn = dim(varIn,f) |
| 178 | + for ii=1:length(varIn) |
| 179 | + varIn{ii} = f*varIn{ii}; |
| 180 | + end |
| 181 | +end |
| 182 | + |
| 183 | +function vOut = cmap2linspecer(vIn) % changes the format from a double array to a cell array with the right format |
| 184 | +vOut = cell(size(vIn,1),1); |
| 185 | +for ii=1:size(vIn,1) |
| 186 | + vOut{ii} = vIn(ii,:); |
| 187 | +end |
| 188 | +end |
| 189 | +%% |
| 190 | +% colorm returns a colormap which is really good for creating informative |
| 191 | +% heatmap style figures. |
| 192 | +% No particular color stands out and it doesn't do too badly for colorblind people either. |
| 193 | +% It works by interpolating the data from the |
| 194 | +% 'spectral' setting on http://colorbrewer2.org/ set to 11 colors |
| 195 | +% It is modified a little to make the brightest yellow a little less bright. |
| 196 | +function cmap = colorm(varargin) |
| 197 | +n = 100; |
| 198 | +if ~isempty(varargin) |
| 199 | + n = varargin{1}; |
| 200 | +end |
| 201 | + |
| 202 | +if n==1 |
| 203 | + cmap = [0.2005 0.5593 0.7380]; |
| 204 | + return; |
| 205 | +end |
| 206 | +if n==2 |
| 207 | + cmap = [0.2005 0.5593 0.7380; |
| 208 | + 0.9684 0.4799 0.2723]; |
| 209 | + return; |
| 210 | +end |
| 211 | + |
| 212 | +frac=.95; % Slight modification from colorbrewer here to make the yellows in the center just a bit darker |
| 213 | +cmapp = [158, 1, 66; 213, 62, 79; 244, 109, 67; 253, 174, 97; 254, 224, 139; 255*frac, 255*frac, 191*frac; 230, 245, 152; 171, 221, 164; 102, 194, 165; 50, 136, 189; 94, 79, 162]; |
| 214 | +x = linspace(1,n,size(cmapp,1)); |
| 215 | +xi = 1:n; |
| 216 | +cmap = zeros(n,3); |
| 217 | +for ii=1:3 |
| 218 | + cmap(:,ii) = pchip(x,cmapp(:,ii),xi); |
| 219 | +end |
| 220 | +cmap = flipud(cmap/255); |
| 221 | +end |
| 222 | + |
| 223 | +function cmap = whiteFade(varargin) |
| 224 | +n = 100; |
| 225 | +if nargin>0 |
| 226 | + n = varargin{1}; |
| 227 | +end |
| 228 | + |
| 229 | +thisColor = 'blue'; |
| 230 | + |
| 231 | +if nargin>1 |
| 232 | + thisColor = varargin{2}; |
| 233 | +end |
| 234 | +switch thisColor |
| 235 | + case {'gray','grey'} |
| 236 | + cmapp = [255,255,255;240,240,240;217,217,217;189,189,189;150,150,150;115,115,115;82,82,82;37,37,37;0,0,0]; |
| 237 | + case 'green' |
| 238 | + cmapp = [247,252,245;229,245,224;199,233,192;161,217,155;116,196,118;65,171,93;35,139,69;0,109,44;0,68,27]; |
| 239 | + case 'blue' |
| 240 | + cmapp = [247,251,255;222,235,247;198,219,239;158,202,225;107,174,214;66,146,198;33,113,181;8,81,156;8,48,107]; |
| 241 | + case 'red' |
| 242 | + cmapp = [255,245,240;254,224,210;252,187,161;252,146,114;251,106,74;239,59,44;203,24,29;165,15,21;103,0,13]; |
| 243 | + otherwise |
| 244 | + warning(['sorry your color argument ' thisColor ' was not recognized']); |
| 245 | +end |
| 246 | + |
| 247 | +cmap = interpomap(n,cmapp); |
| 248 | +end |
| 249 | + |
| 250 | +% Eat a approximate colormap, then interpolate the rest of it up. |
| 251 | +function cmap = interpomap(n,cmapp) |
| 252 | + x = linspace(1,n,size(cmapp,1)); |
| 253 | + xi = 1:n; |
| 254 | + cmap = zeros(n,3); |
| 255 | + for ii=1:3 |
| 256 | + cmap(:,ii) = pchip(x,cmapp(:,ii),xi); |
| 257 | + end |
| 258 | + cmap = (cmap/255); % flipud?? |
| 259 | +end |
| 260 | + |
| 261 | + |
| 262 | + |
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