How to adjust the (absolute) width of bars to 1 unit in a bar plot?

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How to adjust the (absolute) width of bars to 1 unit in a bar plot?
In the following example, the bars are larger than 1 unit:
clear all;clc;close all;
a=[2 6 15 63];
b=[23 4 2 1];
bar(a,b,'FaceColor',[0.5 0.5 0.5],'FaceAlpha',0.2)
xlim([0 Inf])
I mean, even though we set the relative bar width (bar(___,width)) equal to 1, we do not get 1 unit large columns. I guess because we are talking about the relative bar width and not about the absolute bar width.
bar(a,b,1,'FaceColor',[0.5 0.5 0.5],'FaceAlpha',0.2)
xlim([0 Inf])
For example, I would expect that the column centered at tick 2 spans between 1.5 and 2.5.
  6 Comments
Mann Baidi
Mann Baidi on 1 Nov 2023
Update the EdgeColor by
x.EdgeColor=[1 1 1]; % for white edges [0 0 0] for black edges

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Accepted Answer

Dyuman Joshi
Dyuman Joshi on 1 Nov 2023
"I would expect that the column centered at tick 2 spans between 1.5 and 2.5, i.e. 1 unit "
That will be quarter of the width available for a bar -
%Modified values to get a better visual
a=[2 6 15];
b=[23 4 2];
bar(a,b,0.25,'FaceColor',[0.5 0.5 0.5],'FaceAlpha',0.2)
xlim([0 Inf])
vec = [a-0.5;a;a+0.5];
%Adding ticks for visual verification
xticks(vec(:))
ax=gca;
ax.FontSize = 9;
ax.XTickLabelRotation = 90;
  4 Comments
Sim
Sim on 1 Nov 2023
Thanks a lot @Dyuman Joshi for your comments! Yes, I would like to have a general solution..... I guess it would be the following one, right?
bar(a,b,1,'FaceColor',[0.5 0.5 0.5],'FaceAlpha',0.2)
xticks(unique(vec))

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