multi bar labeling plot
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Here's how to locate the center of each grouped bar and label them.
Starting in Matlab R2019B, the center of each bar is stored in
h = bar(___);
h.XEndPoints % x centers
h.YEndPoints % y endpoints
Prior to Matlab R2019B, you can use an undocumented property "XOffset". This was developed and tested in r2019a.
xCnt are the bar centers.
% Generate grouped bar plot
figure()
v = randi(20,12,3);
h = bar(v,.8);
% Get group centers
xCnt = get(h(1),'XData') + cell2mat(get(h,'XOffset')); % XOffset is undocumented!
% Create Tick Labels
xLab = repmat({'p1','p2','p3'},1,numel(xCnt)/3);
% Set individual ticks
set(gca, 'XTick', sort(xCnt(:)), 'XTickLabel', xLab)
Alternatively, you could rotate the x tick labels
set(gca, 'XTick', sort(xCnt(:)), 'XTickLabel', xLab, 'xticklabelrotation', 90)
% Or use xtickangle(): https://www.mathworks.com/help/matlab/ref/xtickangle.html
The best solution would be to use a legend
legend(h,{'p1','p2','p3'})
8 个评论
Sulaymon Eshkabilov
2019-5-16
编辑：Sulaymon Eshkabilov
2019-5-16
My understanding of the problem was just to set colors on each bar that is all. If this is the case, then you need to fix a color in your bar charts as shown above. Otherwise, all done = well, already!
Ali Ali
2019-5-17
Adam Danz
2019-5-17
Glad I could help. I recommend writing a comment in your code noting that xoffset is an undocumented property in case it's ever removed in the future.
Ali Ali
2019-5-18
Is the iterations number the group number? Something like this below?
p1 i1
p2 i1
p3 i1
p1 i2
p2 i2
p3 i2
If so, give this a shot.
% Create Tick Labels
xLab = repmat({'p1 i','p2 i','p3 i'},1,numel(xCnt)/3);
xLab = strrep(xLab,'i',strsplit(num2str(repelem(1:size(v,1),1,size(v,2)))));
Ali Ali
2019-5-19
like below if you can Adam
% xLab are the labels for each individual bar. The pattern you want is the following:
% for every odd triplet, you want [nothing, #, nothing]
% and for every even triplet you want [p#, p#, p#].
% We already have the p# labels so we just need to alter the odd number groups.
% Step 1) Identify the odd number groups.
isOdd = repmat(logical([1,1,1,0,0,0]),1,length(xLab)/6);
% Step 2) Create new labels
newLabs = strsplit(sprintf('| |%d| |', 1:2:length(xLab)/3),'|');
newLabs(cellfun(@isempty, newLabs)) = [];
% Step 3) replace the p# labels for odd groups with [nothing, #, nothing]
xLab(isOdd) = newLabs;
% Step 4) assing newlabels to plot
set(gca, 'XTick', sort(xCnt(:)), 'XTickLabel', xLab, 'xticklabelrotation', 90)
Ali Ali
2019-5-20
更多回答（2 个）
Sulaymon Eshkabilov
2019-5-16
Hi Ali,
Here is a simple solution to your problem:
A= randi([15, 25], 13, 3); % Insert your data here
H = bar(A); shg
H(1).FaceColor='g';
H(2).FaceColor='r';
H(3).FaceColor='b';
Good luck.
Sergio Yanez-Pagans
2021-8-21
0 个投票
1 个评论
Adam Danz
2021-8-21
Cool function, but how does that address the question of how to label the bar groups?
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