MATLAB: Could anyone help me to solve the issue

legend

I want to compare the performance of two systems lets say A and B. I am getting the graph as i have attached it. for legend i have used the command

legend('A','B')

from the graph it is well clear B have better performance than A. so how to have the legend such that B comes first followed by A.

Best Answer

You need to save the handles to the line objects (i.e. the output of plot) in an array. Then you can re-order that array as you please. If you use the 'DisplayName' option in plot, you can avoid having to re-order a cell with the names as well.

%example:
h=[];%make sure h is empty
h(1)=plot(1:5,5+rand(1,5),'rd-','DisplayName','A');
hold on
h(2)=plot(1:5,7+rand(1,5),'bd-','DisplayName','B');
%re-order
order=[2 1];
h=h(order);
legend(h)

Another method is just to re-order the legend once you have it:

h = gca;
hC = findobj(h,'Type','line');
order=[2 1];
legend(hC(order));

Related Solutions

MATLAB: How to show partial legend in figure

To take your first example:

h = zeros(1,3);
h(1) = plot([1:10],'Color','r','DisplayName','This one');hold on;
h(2) = plot([1:2:10],'Color','b','DisplayName','This two');
h(3) = plot([1:3:10],'Color','k','DisplayName','This three'); hold off;
legend(h(2:3)); % Only display last two legend titles

If you didn't have "DisplayName", then you would have to manually add these string to the legend:

legend(h(2:3),'This two','This three');

MATLAB: I have a cell array A and a cell array B and want to re-order info in A according to B.

Here's one approach you could use to re-order the elements of A in a new cell, C:

% Assuming A and B are already loaded into your Workspace
C = cell(size(B));
for i = 1:size(A, 2) % for each element in A
   C(find(strcmp(B, A{1,i}))) = {A{2,i}}; % Put the element from A in the right place in C
end
C(cellfun('isempty',C)) = []; % Remove empty elements

Here, we make C the same size as B, put every element from A in the correct place in C, and then remove the empty elements, so C ends up holding only the matches from A to B.

Note: I ran this with your data, and it appears that some uid's in A are not present in B (only 16 of the 23 elements in A were matched to indexes in B). So, in this case, C becomes a 1x16 cell.

Best Answer

Related Solutions

MATLAB: How to show partial legend in figure

MATLAB: I have a cell array A and a cell array B and want to re-order info in A according to B.

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