t = readtable('YourFile.csv');
[G, ID] = findgroups(t{:,1});
hold on
h = splitapply(@plot, t{:,2}, t{:,3}, G);
xlim auto; ylim auto
if isnumeric(ID)
legend(string(ID));
else
legend(ID);
end
h will now be a vector of chart line objects. Different color and line style combinations will have automatically been chosen for the lines, but at this point you can also set the line() properties as desired. For example,
color_cell = num2cell( parula(size(ID,1)), 2);
set(h, {'Color'}, color_cell); %important that you use cell array for property name
