How can I compare two columns at the bar chart?

I would like add this dotted line to the bar chart (MATLAB 2016a)

[Adam Danz]

Are you using a bar chart or histogram?

[Erfan Zarei]

I am using a bar chart

Answer 1

[Adam Danz]

Here's a demo to get you started.

clf()
h = bar([210, 140, 175, 160]); 
set(gca,'xtick',1:4,'xticklabel',{'A','B','C','D'})
hold on

% Get height of each bar
y = h.YData; 

% draw horizontal line between B and D with a height
% equal to the tallest bar between them. 
xLine = [2,4]; % draw line between bars centered at 2 and 4
halfWidth = 0.4; %estimate of 1/2 the width of the bars
maxHeight = max(y(xLine(1):xLine(2))); 
plot(xLine + halfWidth*[-1,1], maxHeight * [1,1], ':','LineWidth',3, 'color', [1 0.64 0]) %orange

% draw horizontal line between A and D...
xLine = [1,4];  % draw line between bars centered at 1 and 4
maxHeight = max(y(xLine(1):xLine(2))); 
plot(xLine + halfWidth*[-1,1], maxHeight * [1,1], 'g:','LineWidth',3)

% Draw vertical line at bar B, right edge
xLine = 2; % index of bar where vertical line will be drawn along right edge
plot(xLine+halfWidth * [1,1], [y(xLine), max(y)], 'r:','LineWidth',3)

[Erfan Zarei]

Thanks, very good

Do you think that this figure was drawn with another software?

[Adam Danz]

It's possible that another softward produced the figure but the figure can be replicated in Matlab, for sure. You can change the color of the bars to gray. You can also change the width of the bars. You can also make any needed changes to the axes, too.

Check out the properties in bar()

https://www.mathworks.com/help/matlab/ref/bar.html

and axes()

https://www.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html

You can use errorbar() to add the y-error

https://www.mathworks.com/help/matlab/ref/errorbar.html

If you get stuck exploring those possibilities, let's continue the dialogue.