MATLAB: How to use box plots for irregular x-axis intervals

box plots

I would like to use box plots for data that are collected at irregular time intervals. How can I plot multiple boxes at specific x-locations instead of just having them regularly spaced?

Thanks.

Best Answer

While I've not used it, the optional GROUPING input variable should suffice in conjunction with the 'positions' named parameter. See the doc for details...there are a couple of examples of doing so it appears.

Related Solutions

MATLAB: Problem with x-axis labels after overlapping 2 box plots

The answer to the "why" is that boxplot, for reasons I've never been able to figure out, doesn't just change the tick positions and labels. Instead, it removes the xticks completely (or y-ticks, in the case of a horizontally-oriented boxplot) and replaces them with text annotation objects. And annotation objects are positioned relative to the figure, not the axis. Apparently slightly differently each time (possibly due to the fact that boxplot also, for reasons unknown, resizes axis, hence changing the figure-to-axis ratios between calls).

The easiest fix:

delete(findall(gcf, 'type', 'text'));
set(gca, 'xticklabelmode', 'auto', 'xtickmode', 'auto');

MATLAB: How to compute multiple boxplots with vectors of different length using the Statistics Toolbox 4.0 (R13)

The BOXPLOT function allows a grouping argument that allows you plot multiple boxplot on the same figure window. Here is the code to do this:

x = rand(5,1);
y = rand(10,1);
z = rand(15,1);
group = [repmat({'First'}, 5, 1); repmat({'Second'}, 10, 1); repmat({'Third'}, 15, 1)];
boxplot([x;y;z], group)

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Related Solutions

MATLAB: Problem with x-axis labels after overlapping 2 box plots

MATLAB: How to compute multiple boxplots with vectors of different length using the Statistics Toolbox 4.0 (R13)

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