How to assign different colors for data in different rows from a dataframe?
2 views (last 30 days)
Show older comments
For instance, here's a dataframe
T=[label X Y
A 1 2
A 4 5
B 3 5
B 9 10]
I want to make a scatter plot with Y against X, but assign different colors and shapes based on their labels (i.e, A and B). How can I accomplish that? Many thanks!
I can think of using T{1:2,2} to extract different rows, but the real data contain many rows and more than two labels, so it's difficult to count row by row
0 Comments
Accepted Answer
Image Analyst
on 9 Jan 2022
Maybe something like untested
% letters = T{:, 1};
% x = T{:, 2};
% y = T{:, 3};
letters = {'A'; 'A'; 'B'; 'B'}
numUniqueLetters = length(unique(letters))
x = [1;4;3;9]
y = [2; 5; 5; 10];
colors = jet(numUniqueLetters)
g = findgroups(letters)
markerColors = colors(g, :)
scatter(x, y, 300, markerColors, 'filled')
grid on;
8 Comments
Image Analyst
on 27 Feb 2022
You could call scatter several times with a different color each time, or you could use gscatter().
More Answers (0)
See Also
Categories
Find more on Purple in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!