Change color of x axis and y axis barplot

I want a barplot with two different y axis in different colors. The x axis should be in black.

Here is my code:

a=[rand(3,1)*100 zeros(3,1)  ];
b=[zeros(3,1)    rand(3,1)*5 ];
[AX,H1,H2] =plotyy([1:3],a, [1:3],b, 'bar', 'bar');
set(H1,'FaceColor','r') % a
set(H2,'FaceColor','b') % b
 set(AX,{'ycolor'},{'r';'b'})
 

The problem is the x axis whisch should be in black.

I tried

  set(AX,{'ycolor'},{'r';'b'}, {'xcolor'}, {'k'})

but the x axis colour did not change.

Does anybody know how to fix this problem?

Answer 1

[Scott MacKenzie]

I think this achieves what you are after. Note that plotyy is "not recommended".

a = [rand(3,1)*100, zeros(3,1)];
b = [zeros(3,1), rand(3,1)*5];

yyaxis left;
bar(1:3,a);

yyaxis right;
bar(1:3,b);