using a viridis colormap

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Wissem-Eddine KHATLA
Wissem-Eddine KHATLA am 21 Feb. 2022
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.

Akzeptierte Antwort

Image Analyst
Image Analyst am 21 Feb. 2022
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.
  1 Kommentar
Nidia Maldonado Carmona
Nidia Maldonado Carmona am 28 Mär. 2022
Thanks a lot for this! This has been really helpful!

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Weitere Antworten (2)

DGM
DGM am 21 Feb. 2022
Bearbeitet: DGM am 21 Feb. 2022
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','^')
  5 Kommentare
Wissem-Eddine KHATLA
Wissem-Eddine KHATLA am 21 Feb. 2022
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.
Stephen23
Stephen23 am 21 Feb. 2022
@Wissem-Eddine KHATLA: you can also place it into the current directory, which may be easier.

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Wissem-Eddine KHATLA
Wissem-Eddine KHATLA am 23 Feb. 2022
Thank you all for your help : I really got what I was looking for !
Thanks again !

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