How to bar plot legend with group by color ?

Hi all ,I want plot bar graph and show legend with group by color.but now I not sure which I mistake.

when I use command "legend()" The result is as shown in the picture.

## Bar plot

T4 = DAtavi.Turbidity;

y4 = month(DAtavi.Date);

[Uy4,~,Ix] = unique(y4);

T4Max = accumarray(Ix, T4, [], @max);

bar(Uy4, T4Max)

name = {'Jan';'Feb';'Mar';'Apr';'May';'Jun';'Jul';'Aug';'Sep';'Oct';'Nov';'Dec'};

set(gca,'XTick',1:12,'xticklabel',name);

grid on;

hold on;

# Set color

set(bar(Uy4(1), T4Max(1)),'FaceColor','g');

set(bar(Uy4(2), T4Max(2)),'FaceColor','g');

set(bar(Uy4(3), T4Max(3)),'FaceColor','r');

set(bar(Uy4(4), T4Max(4)),'FaceColor','r');

set(bar(Uy4(5), T4Max(5)),'FaceColor','r');

set(bar(Uy4(6), T4Max(6)),'FaceColor','r');

set(bar(Uy4(7), T4Max(7)),'FaceColor','b');

set(bar(Uy4(8), T4Max(8)),'FaceColor','b');

set(bar(Uy4(9), T4Max(9)),'FaceColor','b');

set(bar(Uy4(10), T4Max(10)),'FaceColor','b');

set(bar(Uy4(11), T4Max(11)),'FaceColor','g');

set(bar(Uy4(12), T4Max(12)),'FaceColor','g');

legend()

Answer 1

[Ameer Hamza]

Here is a crude way to solve this problem

T4 = DAtavi.Turbidity;
y4 = month(DAtavi.Date);
[Uy4,~,Ix] = unique(y4);
T4Max = accumarray(Ix, T4, [], @max);
name = {'Jan';'Feb';'Mar';'Apr';'May';'Jun';'Jul';'Aug';'Sep';'Oct';'Nov';'Dec'};

ax = axes();
grid on;
hold on;

hb1 = bar(Uy4(1), T4Max(1), 'FaceColor','g');
bar(Uy4(2), T4Max(2), 'FaceColor','g')
hb2 = bar(Uy4(3), T4Max(3), 'FaceColor','r');
bar(Uy4(4), T4Max(4), 'FaceColor','r')
bar(Uy4(5), T4Max(5), 'FaceColor','r')
bar(Uy4(6), T4Max(6), 'FaceColor','r')
hb3 = bar(Uy4(7), T4Max(7) ,'FaceColor','b');
bar(Uy4(8), T4Max(8) ,'FaceColor','b')
bar(Uy4(9), T4Max(9) ,'FaceColor','b')
bar(Uy4(10), T4Max(10) ,'FaceColor','b')
hb4 = bar(Uy4(11), T4Max(11), 'FaceColor','g');
bar(Uy4(12), T4Max(12), 'FaceColor','g')

legend([hb1 hb2 hb3 hb4])
set(gca,'XTick',1:12,'xticklabel',name);

[Ninlawat Phuangchoke]

Thanks a lot Ameer Hamza

[Ameer Hamza]

I am glad to be of help!