MATLAB: Changing order of legend entries when lslines are included

legendlslineMATLABplot

Hi, I am using MATLAB 2020a and have a graph that includes a legend with both data labels and lsline labels. I have tried suggestions to reorder the legend from
here: https://www.mathworks.com/matlabcentral/answers/654308-changing-order-of-legend-entries
here: https://matplotlib.org/1.3.1/users/legend_guide.html
and here: https://stackoverflow.com/questions/39103748/matlab-change-order-of-entries-in-figure-legend
However, they only seem to address situations where the labels are only coming from the data set(s) in the "plot" command. I have 4 data sets, plus 4 regression lines generated by lsline. The legend entries for lsline are in reverse order, but I can't figure out how to change them.
Here's some code:
figure;
p = plot([1 2;2 1;3 1;1 4]',[1 2;3 1; 4 5;2 4]');
p(1).LineStyle = 'none'; p(1).Marker = 'o'; p(1).MarkerSize = 5;
p(1).MarkerFaceColor = 'b'; p(1).MarkerEdgeColor = 'b'; p(1).DisplayName = '2016 CC';
p(2).LineStyle = 'none'; p(2).Marker = 's'; p(2).MarkerSize = 6;
p(2).MarkerFaceColor = 'b'; p(2).MarkerEdgeColor = 'b'; p(2).DisplayName = '2017 CC';
p(3).LineStyle = 'none'; p(3).Marker = 'o'; p(3).MarkerSize = 5;
p(3).MarkerFaceColor = 'r'; p(3).MarkerEdgeColor = 'r'; p(3).DisplayName = '2016 CS';
p(4).LineStyle = 'none'; p(4).Marker = 's'; p(4).MarkerSize = 6;
p(4).MarkerFaceColor = 'r'; p(4).MarkerEdgeColor = 'r'; p(4).DisplayName = '2017 CS';
h = lsline;
% colors and styles assigned in reverse order - not sure why
h(1,1).LineStyle = '-.'; h(1,1).Color = 'r';
h(1,2).LineStyle = '-'; h(1,2).Color = 'r';
h(1,3).LineStyle = '-.'; h(1,3).Color = 'b';
h(1,4).LineStyle = '-'; h(1,4).Color = 'b';
legend('2016 CC','2017 CC','2016 CS','2017 CS',...
'2017 CS','2016 CS','2017 CC','2016 CC');
Which results in this graph:
The lsline entries are in reverse order, which is reflected in the legend. Rearranging the lsline line assignments would be one fix to my specific issue. But specifically I'm asking how to fix it in the legend.
Thanks in advance.

Best Answer

The easiest way to be certain your legend labels match up is to pass handles specifically:
figure;
p = plot([1 2;2 1;3 1;1 4]',[1 2;3 1; 4 5;2 4]', 'o');
h = lsline;
legend([p' h], '1p','2p','3p','4p','4ls','3ls','2ls','1ls');
The ordering is due to how lsline looks for plotted datasets to regress... it uses get(gca, 'Children'), which always returns plotted objects in reverse stacking order (i.e. top to bottom); in most cases this will mean moving from the most-recently plotted object backwards.
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