How can I change colors and generate errorbars in a bar graph

With the categorical data, how should I:

(1) set two bars into different colors

(2) create errorbars separately

data_1 = [1 2 3 4 5 6];
data_2 = [9 8 7 6 5 4];
mean_1 = mean(data_1);
mean_2 = mean(data_2)
x = categorical({'Variable_1', 'Variable_2'});
y = [mean_1, mean_2];
bar(x,y)

Many thanks!

Answer 1

[Adam Danz]

x = categorical({'A','B'});
y = [3.5, 6.5] ;

% Store the bar handle
bh = bar(x,y);

% Set the bar colors (one color for each bar)
bh.FaceColor = 'flat'; 
bh.CData = [1 0 0; 0 .5 0];  %red; green

% Set errorbars to +/- 0.5 and 1.0
hold on
eb = errorbar(x,y,[.5,1],'LineStyle','none','Color', 'k'); 

●

[Adam Danz]

If you'd also like to get rid of the subscript in the x axis tick labels and show the underscore instead,

set(gca,'TickLabelInterpreter', 'none')