Plot with 3 Variables

I have a table with 3 variables that I would like to put into a plot. I have variable X that I want on the X-axis, variable Y that I want on the Y-axis, and then a third variable titled 'Activity'. Is it possible to plot the X and Y as normal and add the third variable through color coding with a key? I'm open to other ideas as well! Thanks in advance!

Answer 1

[Star Strider]

If I understand correctly, the scatter function (or a combination of scatter and plot if you want the points connnected with lines) would likely work.

Example —

T1 = array2table([rand(20,2) randi(4, 20, 1)], 'VariableNames',{'X','Y','Activity'})

T1 = 20×3 table
       X            Y        Activity
    ________    _________    ________

     0.75828      0.94616       1    
    0.031499      0.22264       4    
     0.10177      0.94944       1    
     0.32075       0.2479       2    
     0.18952    0.0022698       4    
     0.60777      0.99533       1    
      0.2849       0.9708       4    
     0.10925      0.36814       3    
     0.95879      0.31984       4    
     0.69451      0.19754       4    
    0.060238      0.38941       4    
     0.81184      0.44144       1    
     0.41601      0.73352       4    
     0.22987      0.73767       1    
     0.80872      0.18386       3    
     0.64017      0.52881       4    

Ua = unique(T1.Activity);

figure                                                                          % Specific Number Of Unique 'Activity' Values & Legend Entries
hold on
for k = 1:numel(Ua)
    vk = T1.Activity == k; 
    hs{k} = scatter(T1.X(vk,:), T1.Y(vk,:), 25, T1.Activity(vk,:),'filled');
end
hold off
grid
colormap('turbo')
legend([hs{:}],compose('Activity %d',Ua), 'Location','best')

figure                                                                          % Any Number Of Activity Values, Optionally Connectyed By Lines, No Specific LEgend 
scatter(T1.X, T1.Y, 25, T1.Activity,'filled')
hold on
plot(T1.X, T1.Y, ':k')
hold off
grid
colormap('turbo')

Make appropriate changes to get the result you want

.

Answer 2

[Image Analyst]

Sure

plot(t.X, t.Y, 'b.-'); % t is your table variable.

Not sure what the third variable is or how you want it to appear on the x-y graph. Please explain and attach your table in a .mat file

save('answers.mat', 'yourTable');

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