legend plot of subgroup lines

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Eugenio Daviso
Eugenio Daviso 2017-10-30
回答： Walter Roberson 2017-10-31
I am preparing a gui that gives the operator the flexibility to fit n datafiles. Each datafiles contains 3 replicates. I would like to add a legend to the plot that groups the 3Xn lines and I can't get there. Thank you!
This is my code:
% code
figure(2)
hold on;
tot_f=1;
for k=1:3:(size(Data_dim,2))
color_plot(tot_f,:)=[rand(1),rand(1),rand(1)];
h{tot_f}=plot(time, Y(:,k:k+2),'Color', color_plot(tot_f,:));
xlabel('Time (s)')
ylabel('NU')
ax=gca;
ax.YLim=[0 50];
ax.XLim=[0 100];
tot_f=tot_f+1;
end
hold off;
legend(????);

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采纳的回答

Walter Roberson
Walter Roberson 2017-10-31
% code
figure(2)
hold on;
tot_f=1;
for k=1:3:(size(Data_dim,2))
color_plot(tot_f,:)=[rand(1),rand(1),rand(1)];
h{tot_f}=plot(time, Y(:,k:k+2),'Color', color_plot(tot_f,:));
desired_legends{tot_f} = ... some appropriate string
xlabel('Time (s)')
ylabel('NU')
ax=gca;
ax.YLim=[0 50];
ax.XLim=[0 100];
tot_f=tot_f+1;
end
hold off;
group_handles = cellfun(@(V) V(1), h); %get first out of each group
legend(group_handles, desired_legends)

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