How to show the legend of zero values as a line?

I have below the following example,that shows the bars for the following vectors:

% % For Phi/Psi = +/-10
CoverageArea_mean_10 = [84.4735,21.1779,6.4247,2.1416]; 
CoverageArea_min_10 = [98.5128,21.1779,6.9007,2.1416]; 
CoverageArea_max_10 = [70.1963,19.0363,5.9488,2.1416];
% For Phi/Psi = +/-40
CoverageArea_mean_40 = [0,4.5211,2.3795,0]; 
CoverageArea_min_40 = [92.5640,21.1779,6.9007,2.1416]; 
CoverageArea_max_40 = [0,0.4759,0.2380,0]; 

as shown below

The problem is there are some zero values and I need them to be represented as a line on legend. How can I fix it?

%% Plotting the coverage area
x = [15,30,45,60];

figure
COVERAGE = [CoverageArea_min_10;CoverageArea_mean_10;CoverageArea_max_10];
COVERAGEAREA = [COVERAGE(:,1)';COVERAGE(:,2)';COVERAGE(:,3)';COVERAGE(:,4)'];
bar(x,COVERAGEAREA);
xlabel( 'Semi-angle at half power, \Phi_1_/_2 (°)' );
ylabel('Coverage area (m²)');
BarNames = {'min','mean','max'};
legend(BarNames,'Location','best');
grid on;

figure
COVERAGE1 = [CoverageArea_min_40;CoverageArea_mean_40;CoverageArea_max_40];
COVERAGEAREA1 = [COVERAGE1(:,1)';COVERAGE1(:,2)';COVERAGE1(:,3)';COVERAGE1(:,4)'];
bar(x,COVERAGEAREA1);

xlabel( 'Semi-angle at half power, \Phi_1_/_2 (°)' );
ylabel('Coverage area (m²)');
BarNames = {'min','mean','max'};
legend(BarNames,'Location','best');
grid on;

[KALYAN ACHARJYA]

I don't see any zero value here

[Haitham AL Satai]

@KALYAN ACHARJYA These vectors have zeros, sir.

% For Phi/Psi = +/-40
CoverageArea_mean_40 = [0,4.5211,2.3795,0]; 
CoverageArea_min_40 = [92.5640,21.1779,6.9007,2.1416]; 
CoverageArea_max_40 = [0,0.4759,0.2380,0]; 

And I need them to be represented as a line in the legend.

[Star Strider]

The zero values in ‘CoverageArea_mean_40’ and ‘CoverageArea_max_40’ are already represented as bars on the legend. What result do you want?

[Haitham AL Satai]

@Star Strider They are represented, you are right, but they are shown in the legend. What I mean is any zero value I need it as a line not a bar. Something like below:

Answer 1

[Manoj Mirge]

Hi,

I couldn’t find any proper way to achieve your desired result and I couldn’t see the ways to convert the box legend to a line legend. But I have come up with a possible workaround for your problem.

In bar graph, if you add line plot on the same axis of a bar graph then you will get line legend on that axis. So, you can give desired colour and legend name to the line legend.

I have tried to achieve desired result for your second graph in the code below:

CoverageArea_mean_40 = [0,4.5211,2.3795,0];  
CoverageArea_min_40 = [92.5640,21.1779,6.9007,2.1416];  
CoverageArea_max_40 = [0,0.4759,0.2380,0];  
x = [15,30,45,60]; 
figure 
COVERAGE1 = [CoverageArea_min_40;CoverageArea_mean_40;CoverageArea_max_40]; 
COVERAGEAREA1 = [COVERAGE1(:,1)';COVERAGE1(:,2)';COVERAGE1(:,3)';COVERAGE1(:,4)']; 
bar(x,COVERAGEAREA1); 
xlabel( 'Semi-angle at half power, \Phi_1_/_2 (°)' ); 
ylabel('Coverage area (m²)'); 
legend('min','Location','best');% Just add only the min legend because you want it to be box legend. 

% You can add  plot that will add legend on you bar  

hold on; 

% And you can manually put colour to your line's legend. 

% You will have to manually check the colours of mean and max bar and give 

% that colour to line legends. You can find colours of mean and max bar from 

% property inspectors of figure. 
plot([0],[0],"-","DisplayName",'mean','color',[0.85,0.33,0.10]); 
plot([0],[0],"-","DisplayName",'max','color',[0.93,0.69,0.13]); 
grid on; 

Hope this helps.

[Haitham AL Satai]

@Manoj Mirge Thanks dear.