Add legend to scatter
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Marc Jakobi
on 9 Nov 2013
Answered: Tony Castillo
on 26 Jul 2023
Hi.
I have coded the following for two scatters of measured values:
Plot2 = figure;
PV_TA2 = axes('Parent',Plot2);
hold(PV_TA2,'all');
scatter(T,I_K,'r', 'filled');
hold on
scatter(T,U_L,'g', 'filled');
xlabel('Temperatur in °C');
ylabel('Leerlaufspannung in mV | Kurzschlussstrom in mA');
title('Temperaturabhängigkeit','FontSize',14);
legend(Plot2,'I_K','U_L','Location','Best');
%Trend line
Poly2 = polyfit(T,U_L,1);
Poly3 = polyfit(T,I_K,1);
Trend2 = polyval(Poly2,T);
Trend3 = polyval(Poly3,T);
hold on
plot(T,Trend2, 'k', 'LineWidth', 1.5);
hold on
plot(T,Trend3, 'k', 'LineWidth', 1.5);
But the legend won't appear, so there must be something wrong.
How can I add a legend to my scatter. It should show a red dot or square depicting the short circuit current and a green one showing the open-circuit voltage.
Thanks for any hints!
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Accepted Answer
Azzi Abdelmalek
on 9 Nov 2013
legend('I_K','U_L','Location','Best');
7 Comments
Azzi Abdelmalek
on 9 Nov 2013
Edited: Azzi Abdelmalek
on 9 Nov 2013
I'am not following you. If I've understood, you want just to replace the legend
legend('short-circuit current', 'open-circuit voltage','Location','Best');
Azzi Abdelmalek
on 9 Nov 2013
Marc commented
Oh, now I understand it. I misunderstood the way the legend function works. I thought you had to use legend('I_K', 'U_L', 'Location', 'Best') with I_K and U_L referring to the vectors U_L and I_K that were scattered. I did not realize that the order of the strings determines which one refers to which variable.
Thanks for your help!
More Answers (1)
Tony Castillo
on 26 Jul 2023
Dear all,
I am having issues meanwhile I attempt adding legend to my SCATTER figure, I use this line of code legend ({'k1_{Winter}', 'k2_{Fall}', 'k3_{Summer}', 'k4_{Spring}'},'Location','Best') but only print the first one, how to solve this?
Sincerely
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