Add legends to specific data points

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Megan Powell
Megan Powell 2021-8-18
评论： Megan Powell 2021-8-19
Hi, I want to add a legend outlining the different coloured points on the plot, could someone help please.
i=0;
for i=1:21
if (i >=1 && i<=11)
% Plotting data points
h=errorbar(x(i),y(i),err(i),'o', 'LineWidth', 2, 'MarkerFaceColor','g','Color','g');
legend(h, 'Loading')
hold on;
% Plotting line of best fit
else
h2=errorbar(x(i),y(i),err(i),'o', 'LineWidth', 2, 'MarkerFaceColor','b','Color','b');
legend(h2, 'Unloading')
hold on;
end
end
plot(x, yfit, '-r','LineWidth', 2, 'DisplayName', 'Regression Line')

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DGM
DGM 2021-8-18
编辑：DGM 2021-8-18
Ran in:
Something like this:
% fake data
x = 1:21;
y = (1:21) + 0.2*randn(1,21);
yfit = x;
err = ones(1,21);
hold on;
h(1) = errorbar(x(1:11),y(1:11),err(1:11),'o', 'LineWidth', 2, 'MarkerFaceColor','g','Color','g');
h(2) = errorbar(x(12:end),y(12:end),err(12:end),'o', 'LineWidth', 2, 'MarkerFaceColor','b','Color','b');
h(3) = plot(x, yfit, '-r','LineWidth', 2);
legend(h,{'Loading','Unloading','Regression'},'location','northwest')
box on

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