Can I change the width of a single bar in a bar plot?

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Corymbiamaculata
Corymbiamaculata 2022-3-14
评论： Corymbiamaculata 2022-3-14
I have a grouped bar plot, bb:
bb = bar(x,y)
where x is a 7x1 double vector with month numbers and y is a 7x5 double vector with measurement data. For each of the seven time points, I get five bars with data.
I would like to add some spacing between the first two and the last three bars in each group. One idea I came up with is to add a column of NaNs to y (to make it 7x6 with the third column empty). However, this creates a very wide gap between my bars. I would prefer to make it smaller by changing the width of this 'NaN' bar in the plot while keeping the other bars as they are. Is there a way to do this?

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回答（1 个）

Voss
Voss 2022-3-14
Ran in:
Does the gap still appear too wide if you widen the bars?
x = (1:7).';
y = rand(7,5);
new_y = NaN(size(y)+[0 1]);
new_y(:,[1 2 4:end]) = y;
% bb = bar(x,new_y);
bb = bar(x,new_y,'BarWidth',1);
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Adam Danz
Adam Danz 2022-3-14
There's no way to do that using the bar() command with grouped bars.
An ugly workaround may be possible such as plotting all bars individually and computing their x-coordinates but it sounds like a headache and something vulnerable to bugs.
Perhaps you could visually group them using color or xline lines but I haven't thought out the details.
Corymbiamaculata
Corymbiamaculata 2022-3-14
I actually have them grouped by a hatched pattern already, but I'm still not 100% satisfied, that's why I hoped there was a way to add a small gap within the groups.
I can obviously divide the data into two figures, but I hoped to avoid that, since each figure has six subplots. I don't want to multiply entities beyond necessity :)

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