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

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

[Franciszek Aniol]

Found a solution on this thread:

https://de.mathworks.com/matlabcentral/answers/211314-plotting-multiple-bar-graphs

and i recommend this example, because it doesn't go over my head :)

https://de.mathworks.com/matlabcentral/answers/211314-plotting-multiple-bar-graphs#answer_351164