Plotting data in table after grouping

Hello,

I'm trying to plot data in a table after grouping it. If possible, I'd like to avoid using for loops with repeated 'plot' calls, since I think it would be slow. See below for an example of what I'm trying to do. Is there a way to make this code more efficient (e.g., avoid using for loops, or make a single 'plot' call)?

Thank you,

Abed

tbl = table([1;1;1;2;2;2;2;3;3],[0;1;4;0;2;3;5;1;4],rand(9,1),'VariableNames',{'id','t','x'});
uniqueIDs = unique(tbl.id);
figure;
hold on;
for iID = 1:length(uniqueIDs)
    t = tbl.t(tbl.id==uniqueIDs(iID));
    x = tbl.x(tbl.id==uniqueIDs(iID));
    plot(t,x);
end

Answer 1

[Adam Danz]

arrayfun() is one way to do that.

tbl = table([1;1;1;2;2;2;2;3;3],[0;1;4;0;2;3;5;1;4],rand(9,1),'VariableNames',{'id','t','x'});
figure(); 
hold on
arrayfun(@(i)plot(tbl.t(tbl.id==i),tbl.x(tbl.id==i)),unique(tbl.id)) % do plotting

[Abed Alnaif]

Hi Adam,

Thanks for your answer.

Abed

[Adam Danz]

Glad I could help!