using a viridis colormap

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Wissem-Eddine KHATLA 2022-2-21

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评论： Nidia Maldonado Carmona 2022-3-28

Hello everyone,

I would like to know how is it possible to use properly a viridis colormap in order to draw scatter figures. For instance, i have this figure to plot :

figure(2)
plot(x1,y1,'^r','MarkerSize',8,'MarkerFaceColor','r')
% plot(x1,y1,'^r','MarkerSize',8,'MarkerFaceColor',viridis(5))
xlabel('F_{vis}')
ylabel('F_{flambement}','FontSize',13)

But I don't know how to use this "alternative" colormap since I am not familiar with this function in this case.

Could someone help please ?

Thank you in advance.

Sincerely.

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Answer 1

Image Analyst 2022-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/1654790-using-a-viridis-colormap#answer_901210

ColorOrder_demo.m

See attached demos where I show you how you can replace the default color order of plots and markers with some custom colormap of your own creation.

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Nidia Maldonado Carmona 2022-3-28

Thanks a lot for this! This has been really helpful!

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Answer 2

DGM 2022-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/1654790-using-a-viridis-colormap#answer_900930

编辑：DGM 2022-2-21

在 MATLAB Online 中打开

viridis.m

Use scatter() instead of plot(). The behavior of viridis() is otherwise the same as the built-in functions like jet().

N = 20;

x1 = randn(N,1);

y1 = randn(N,1);

scatter(x1,y1,50,viridis(N),'filled','^')

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Wissem-Eddine KHATLA 2022-2-21

Yes you are right : I totally missed this argument. However, I am still unable to use this command since the viridis function is not recognized despite the fact that it's added to my current path. I don't understand why it doesn't work : I am going to check again for the path directory.