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

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Corymbiamaculata 2022-3-14

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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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Answer 1

Voss 2022-3-14

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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 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 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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