How to draw a bar graph from cell array with different size length?
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For example, i have a = [{1}; {[3 5]}; {[4 6 7]}; {[3 6 7 9]}]. How do I plot the cell array in one bar graph?
4 Comments
C.J. Harris
on 16 Jan 2012
How would you link the data you have provided to the legend (as shown in your example figure)? In the example groups 3 & 5 have only two bars, but it is clearly item 003 which is missing.
The data you have provided doesn't make it clear which elements are missing from each group - and therefore you run the risk of having very misleading bar colours.
Accepted Answer
Matt Tearle
on 16 Jan 2012
This will extract the values and add zeros to the end, then extract all to a matrix. But are you sure the missing values are always at the end? A safer approach would be to import with NaN placeholders where the values are missing. How are you importing the data?
a = [{1}; {[3 5]}; {[4 6 7]}; {[3 6 7 9]}];
n = max(cellfun(@length,a));
f = @(x) [x,zeros(1,n-length(x))];
a = cellfun(f,a,'UniformOutput',false);
x = cat(1,a{:})
bar(x')
4 Comments
Matt Tearle
on 16 Jan 2012
Oh, yes, sorry I misunderstood which way you wanted them grouped. That's good: bar(x) is even neater than having to transpose.
More Answers (2)
C.J. Harris
on 16 Jan 2012
If you are going to pad out your arrays with zeros you don't even need to define it as a cell array, just use a matrix.
Try this:
a = [1 0 0 0; 3 5 0 0; 4 6 7 0; 3 6 7 9];
bar(a,'group')
Walter Roberson
on 16 Jan 2012
L = max(cellfun(@length, a));
bar( cell2mat( @(V) [V, zeros(1,L-length(V))], a, 'Uniform', 0), 'group' )
3 Comments
Walter Roberson
on 16 Jan 2012
bar( cell2mat( cellfun(@(V) [V, zeros(1,L-length(V))], a, 'Uniform', 0)), 'group' )
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