Example from Bar Graph Plot doesn't function in R2019a #categorical

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When i try the example code:
X = categorical({'Small','Medium','Large','Extra Large'});
X = reordercats(X,{'Small','Medium','Large','Extra Large'});
Y = [10 21 33 52];
bar(X,Y)
from: https://de.mathworks.com/help/matlab/ref/bar.html @ Specify Categorical Data
i get this:
Error using bar (line 222)
Data inputs must match the axis configuration. A numeric axis must
have numeric data inputs or data inputs which can be converted to
double.
Error in Untitled (line 5)
bar(X,Y)
My use case is this following Bar Plot:
Due to how bar plot is configured i find it, much more different to access each bar seperately.
With my code ending as such:
b = bar(data_total.x , data_total.mean,'FaceColor','flat');
random.a = 0;
random.b = 1;
for n = 1:6
random.r = (random.b-random.a).*rand(3,1) + random.a;
b.CData(n,:)= random.r;
end
er = errorbar(data_total.x , data_total.mean, data_total.errhigh, data_total.errlow);
er.Color = [0 0 0];
er.LineStyle = 'none';
Is there a more elegant solution to make the graph easier to read in this case?
Can I plot multiple bar graphs in to a single plot?
If not how do I write 'strings' / text in the x axis of this bar plot?
with regards,
Franek

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