CRAMERI provides an ergonomic packaging of the Scientific Colourmaps provided by Fabio Crameri under the MIT license at https://www.fabiocrameri.ch/colourmaps/. If using any of the provided colorschemes in a publication you should cite the following references:
-
Crameri, F. (2018). Scientific colour maps. Zenodo.
https://doi.org/10.5281/zenodo.1243862 -
Crameri, F., G.E. Shephard, and P.J. Heron (2020), The misuse of colour in science communication, Nature Communications, 11, 5444. https://doi.org/10.1038/s41467-020-19160-7
The above table, showing all the continuous colormaps defined in the package, can be retrieved at run time by invoking the paletteshow.crameri command. Please note that all the sequential colormaps have also a corresponding categorical/qualitative colorset, that can be requested by appending an uppercase S at the end of the name, e.g. palette.crameri('turku') would give the Turku colormap and palette.crameri('turkuS') the corresponding discrete colorset. All colorschemes can be inverted by prepending a - character (e.g. palette.crameri('-turku')). Calling palette.crameri without outputs would automatically set the colorscheme, without the need to explicitly calling the built-in colormap function. More info can be found typing help palette.crameri or by inspection of the following examples.
% Oslo colormap for a sample PHOTO:
S = load('mandrill');
imshow(S.X,palette.crameri('oslo'))
% A nice alternative to the classic red-blue divergent map:
[X,Y,Z] = peaks(50);
surfc(X,Y,Z+4)
palette.crameri('bam','pivot',4) % recenter the color-axis
% A trick to deal with nasty CONTOURCMAP function (Mapping Toolbox):
preset_palette(@palette.crameri, 'oleron'); % preselect the colorscheme.
load topo
load coastlines
figure
worldmap(topo, topolegend);
contourfm(topo, topolegend);
plotm(coastlat, coastlon, 'k');
contourcmap('preset_palette', 'Colorbar','on', 'Location','horizontal',...
'TitleString','Contour Intervals in Meters'); % Et Voilà...
% -> we have applied our beautiful colormap through the preset function!
% Plot and compare RGB values:
ax(1) = subplot(1,3,1);
cmap1 = palette.crameri('batlowK');
rgbplot(cmap1); title('batlowK')
xlim([0,256]); xticks([]);
colorbar('southoutside');
colormap(ax(1),cmap1);
ax(2) = subplot(1,3,2);
cmap2 = palette.crameri('batlow');
rgbplot(cmap2); title('batlow')
xlim([0,256]); xticks([]);
colorbar('southoutside');
colormap(ax(2),cmap2);
ax(3) = subplot(1,3,3);
cmap3 = palette.crameri('batlowW');
rgbplot(cmap3); title('batlowW')
xlim([0,256]); xticks([]);
colorbar('southoutside');
colormap(ax(3),cmap3);
% Multiline plot using matrices:
N = 6;
axes('ColorOrder',palette.crameri('turkuS'),'NextPlot','replacechildren')
% > notice that N is not passed, replaced by the *S categorical option.
X = linspace(0,3*pi,1000);
Y = bsxfun(@(x,n)n*sin(x+2*n*pi/N), X.', 1:N);
plot(X,Y, 'linewidth',4); box on; xlim([0,3*pi]);
% Multiline plot in a loop:
set(0,'DefaultAxesColorOrder',palette.crameri('actonS'))
% > notice the *S option, giving a categorical colormap.
N = 6;
X = linspace(0,10,1000);
Y = bsxfun(@(x,n)n*sin(x+2*n*pi/N), X.', 1:N);
for n = 1:N
plot(X(:),Y(:,n), 'linewidth',4);
hold all
end
xlim([0,3*pi]);
If you wish to upgrade the colormaps (currently we bundle version 7.0.1) we provide a semi-automatic1 procedure: you need to visit the official ZENODO repository and annotate the record number of the version you want to download. So you can type
crameri_update(release_major,record_number)and wait for MATLAB to download and appropriately place the official color data inside your package installation. Immediately after finish the updated colormaps are ready to call with the palette.crameri command. Invoking crameri_update, without inputs, will print to stdout the docstring, so to alleviate the annoyance of retrieving the doi link.
PRESET_PALETTE is a wrapper for any colormap function, storing the function and any parameter values for future calls.
preset_palette(@palette.crameri, '-berlin')
colormap(preset_palette)© 2018 Chad A. Greene, original CRAMERI function
© 2022 Gabriele Bellomia, PALETTE package adaptation
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
-
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
-
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution
-
Neither the name of The University of Texas at Austin nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Footnotes
-
Making the workflow completely automatic, i.e. upgrading to latest release by default or to any version if requested (but without quering for the explicit record number), is an intended future enhancement. Though it might not come soon, being ZENODO somehow uncooperative on the matter. ↩