Creating a stacked bar plot with a non-unique x-axis.

Im working with fear data where the subject will freeze for a specific amount of time. This time varies and the location on the track where this happens also varries. I have 2 arrays, one with the location and one with the length of the fear. I wanted to plot this 'stacked' in a barplot so you can easily see the amount of occurances and the total time someone was frozen at a specific location. However, when i try to do this i get the following error: "XData values must be unique."

Is there a way for me to fix this?

Some example data: (as you can see freezes can happen on the same x location, in this example (and my own data) the 1st x value corresponds with the 1st y value).

x = [2, 3, 6, 9, 2, 6, 2, 5, 4];
y = [4, 2, 3, 1, 3, 2, 5, 2, 5];
bar(x, y, 'stacked')

Answer 1

[Voss]

Does this work?

x = [2, 3, 6, 9, 2, 6, 2, 5, 4];
y = [4, 2, 3, 1, 3, 2, 5, 2, 5];

xx = min(x):max(x);
nxx = numel(xx);
counts = histcounts(x,nxx);

yy = NaN(max(counts),nxx);
for ii = 1:nxx
    yy(1:counts(ii),ii) = y(x == xx(ii));
end

bar(xx, yy, 'stacked')

[Martijn Heemskerk]

Hey, it works, but it also doesn't work. It does allow me to plot the graph but its doing something weird to the values. I currently have 2 plots which use the same x-axis data. The bottom plot has the added y data of the duration, where the top plot is simply just a histcount of how often a freeze has occured on a specific location. As you can see the same amount of bars appear, but these bars are not on the exact same place as the graph on top. This behaviour is also seen on the rest of the plots, I simply used this one as an example. The environment x range, ranges from -2:39 (in case that changes anything).

[Martijn Heemskerk]

Nevermind, i found the anomaly! My code was doing something weird, not yours. Thank you for your help!