way to legend a data organized into colours in simple plot?

first_data = [[3 4 8 1];[3 6 4 9]];  % desired legend (first) & color (green)
second_data = [[1 3 5];[3 2 7];[3 4 2]]; % desired legend (second) & color (cyan)
combine = {first_data,second_data};  % recieving new data in every 'for' loop iteration thats why combining
colours = {'g','c'};
Legend_Names = {'first','second'};
for i = 1:length(combine)
    plot(cell2mat(combine(i)),'Color',cell2mat(colours(i)),'LineWidth',2); grid on; hold on;
end
legend(Legend_Names)

i wish to plot my each data set with same colour... in this case legend ''Second'' should have ''cyan'' colour

Answer 1

[Star Strider]

I am not certain what you want.

One option —

first_data = [[3 4 8 1];[3 6 4 9]];  % desired legend (first) & color (green)
second_data = [[1 3 5];[3 2 7];[3 4 2]]; % desired legend (second) & color (cyan)
combine = {first_data,second_data};  % recieving new data in every 'for' loop iteration thats why combining
colours = {'g','c'};
Legend_Names = {'first','second'};
for i = 1:length(combine)
    hp{i} = plot(cell2mat(combine(i)),'Color',cell2mat(colours(i)),'LineWidth',2, DisplayName=Legend_Names{i});
    hold on;
end
grid on; 
legend([hp{1}(1) hp{2}(1)], Location = 'best')

●

For either of these, it is necessary to return the handles of each plot call, and pass them to the legend call..

EDIT — Ran code again.

.

[taimour sadiq]

Dear Star thanks for your Guidence, i exactly desired what you Guided.

Just Sharing your Code for Release 2019a as i mentiond in question.

first_data = [[3 4 8 1];[3 6 4 9]];  % desired legend (first) & color (green)
second_data = [[1 3 5];[3 2 7];[3 4 2]]; % desired legend (second) & color (cyan)
combine = {first_data,second_data};  % recieving new data in every 'for' loop iteration thats why combining
colours = {'g','c'};
Legend_Names = {'first','second'};
for i = 1:length(combine)
    hp{i} = plot(cell2mat(combine(i)),'Color',cell2mat(colours(i)),'LineWidth',2,'DisplayName',cell2mat(Legend_Names(i))); hold on;
end
grid on; 
legend([hp{1}(1) hp{2}(1)], 'Location', 'best')

[taimour sadiq]

a little guidence further required with last line..

 legend([hp{1}(1) hp{2}(1)], 'Location', 'best')

instead of manually defining >> [hp{1}(1) hp{2}(1)] << how can i automate it , lets suppose if i have three data sets combine = {first_data,second_data, third_data};

[Walter Roberson]

legend( cellfun(@(C)C(1), hp), 'location', 'best')

[taimour sadiq]

Works... Thanks

[Star Strider]

As always, my (our) pleasure!

(Thanks, @Walter Roberson. I was still sleeping 3 hours ago.)