I could not display all the legends related to the plotted bars

Question

ilyes louahem m'sabah 2024-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/2098076-i-could-not-display-all-the-legends-related-to-the-plotted-bars

回答： Dyuman Joshi 2024-3-24

采纳的回答： Dyuman Joshi

在 MATLAB Online 中打开

When i run the simple code below i get the following error:

Warning: Ignoring extra legend entries.

> In legend>set_children_and_strings (line 643)

In legend>make_legend (line 328)

In legend (line 254)

In Data_calculation (line 18)

-------------Code-----------------

x=1:5;

y=[4.65,31.41,3.92,4.23,0.47];

b=bar(x,y,0.5,'stacked')

b =

Bar with properties: BarLayout: 'stacked' BarWidth: 0.5000 FaceColor: [0 0.4470 0.7410] EdgeColor: [0 0 0] BaseValue: 0 XData: [1 2 3 4 5] YData: [4.6500 31.4100 3.9200 4.2300 0.4700] Use GET to show all properties

grid on

ylabel('Output energy of the HRES components (MWh/year)')

set(gca, 'XTickLabel',{'PV','WT','Batt','DG','excess'}) %labeling x-axis

legend('PV','WT','Batt','DG','excess') %<-----------------% this is line 18

Warning: Ignoring extra legend entries.

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Answer 1

Dyuman Joshi 2024-3-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2098076-i-could-not-display-all-the-legends-related-to-the-plotted-bars#answer_1430041

在 MATLAB Online 中打开

You get a single legend entry because there is only a single graphical object.

If you want a separate legend for each bar, you need to plot them as separate bar objects.

One appoach to obtain that is as follows -

x=1:5;
y=[4.65,31.41,3.92,4.23,0.47];
%Modification
z = diag(y,0)
z = 5x5
    4.6500         0         0         0         0
         0   31.4100         0         0         0
         0         0    3.9200         0         0
         0         0         0    4.2300         0
         0         0         0         0    0.4700
%Modified call to bar()
b=bar(x,z,0.5,'stacked')
b = 
  1x5 Bar array:

    Bar    Bar    Bar    Bar    Bar