How do I control the legend contents when the plot functions are within a for loop?

I'm running into a problem pertaining to legend control in some legacy code. Specifically, how do I suppress the data2 and data4 entries of the legend (in the attached png file) using the following code:

figure('Name', 'Elapsed Time', 'Position', [350 350 610 250] );
hold on;
for FileNum = 1:num_srcs
    h1 = plot(data{FileNum}(:, 9), '-*', 'Color', color1{FileNum}, 'DisplayName', disp_name{FileNum} );
    %hold on;
    h2 = plot( data2{FileNum}(:, 9), '*', 'Color', color1{FileNum} );
    %hold off;
end
%hold off;
legend('location', 'NEO'); % works, but includes the legend entries for data2 and data4
%legend(h1);
%legend(h1, 'location', 'NEO');
%legend(h1, disp_name{FileNum}, 'location', 'NEO');
set(legend, 'FontSize', 20);
H = gca;
set(H, 'YGrid', 'on', 'GridLineStyle', '-');
box on;

The data2 and data4 data series are the points with no lines (far left side of plot).

In reading the MATLAB documentation and reviewing Aravin's question in January 2012, it appeared the solution was to include only h1 in the legend, using the following line of code;

legend(h1, 'location', 'NEO');

This did not produce the desired result. I've also tried re-locating the hold functions and other legend functions - none have worked.

Is it possible the for loop is adversely affecting the legend function?

Here's the link to Aravin's original question in January 2012: http://www.mathworks.com/matlabcentral/answers/25381-how-to-show-partial-legend-in-figure

Answer 1

[Mischa Kim]

Brad, see this answer. Or, more closely related to your question:

 x     = 0:0.1:10;
 data1 = sin(x);
 data2 = cos(x);
 data3 = sin(x).^2;
 data4 = cos(x).^2;
 figure();
 p1 = plot(x,data1,'bo-');
 hold on
 p2 = plot(x,data2,'rx-');
 p3 = plot(x,data3,'kd-');
 p4 = plot(x,data4,'gs-');
 legend([p1,p3],'From data1','From data3');

[Brad]

Mischa, I tried this approach as well. But had no success. However, when I tried this:

legend([h1]);

The data2 and data4 entries in the legend went away. But so did the 500 entry.

[Mischa Kim]

Can you attach the entire code and all data files? Just briefly browsing through your code I noticed that h1 and h2 are overwritten every time the loop is executed. Try

 x         = 0:0.1:10;
 data(1,:) = sin(x);
 data(2,:) = sin(x);
 data(3,:) = cos(x);
 data(4,:) = cos(x);
 figure();
 my_col = jet(2);
 hold on
 for ii = 1:2
    p(2*ii-1) = plot(x,data(2*ii-1,:),'*-','color',my_col(ii,:));
    p(2*ii)   = plot(x,data(2*ii  ,:),'*', 'color',my_col(ii,:));
 end
 legend([p(1),p(3)],'From data1','From data3');

Again, to properly diagnose the problem it'd be helpful to have access to your data.

[Brad]

Would the workspace variables be sufficient?

[Brad]

Mischa, it appears we found a solution. We added this line of code:

set(get(get(h2, 'Annotation'), 'LegendInformation'), 'IconDisplayStyle', 'off');

after this line of code:

h2 = plot( data2{FileNum}(:, 9), '*', 'Color', color1{FileNum} );

So far, it appears to be running great.