How to color each group of a bar plot into a different color

I have a bar plot with 16 groups with each group having 3 bars. I want to color each group of bar plot into a different color. Someone please help me out with this.

Answer 1

[Dyuman Joshi]

%Random data
mat = randi(20, 16, 3);

%Plot bar graph
b = bar(mat);

n = size(mat,1);
%Get color for each group
color = hsv(n);

%Change the color for each group
for k=1:size(mat,2)
    b(k).FaceColor = 'flat';
    b(k).CData = color;
end

[priyam kar]

Thanks again for your help, this worked perfectly

[Dyuman Joshi]

You're welcome!

Answer 2

[Adam Danz]

h=bar(x,'grouped') where x is an n by m matrix, will create a bar chart with n groups that each have m bars. h will be a 1xm matrix of bar handles.

To apply a color to each group, create a n by 3 matrix of RGB color values that defines the color for each group. Then apply the color matrix to the CData property of each bar object (R2017b or later). You'll also need to set FaceColor to flat.

rng default 
data = rand(16,3); 
b = bar(data, 'grouped');

colors = rand(height(data),3); 

for i = 1:numel(b)
    b(i).FaceColor = 'flat'; 
    b(i).CData = colors; 
end

[Dyuman Joshi]

@Adam Danz, this works without providing the 'grouped' argument as well.