multi bar labeling plot

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Ali Ali
Ali Ali 2019-5-16
编辑： Adam Danz 2021-12-10
I want to label each three bars as p1, p2 and p3 for all at the base as the pic attached.. i appreciate any help someone can provide.
  2 个评论
Adam Danz
Adam Danz 2019-5-16
Wouldn't a legend defining the colors make more sense?
Ali Ali
Ali Ali 2019-5-16
you are right.. but i'll manopolate with the colors later.. so it will not be fixed as it now.

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采纳的回答

Adam Danz
Adam Danz 2019-5-16
编辑：Adam Danz 2021-12-10
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'})
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Adam Danz
Adam Danz 2019-5-19
编辑：Adam Danz 2019-5-19
% 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
Ali Ali 2019-5-20
thank you a lot Adam.. this is realy helped me.

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更多回答（2 个）

Sulaymon Eshkabilov
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.
  1 个评论
Ali Ali
Ali Ali 2019-5-17
Sulaymon Eshkabilov i think you did not get my point.. anyway thank you for your help.

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Sergio Yanez-Pagans
  1 个评论
Adam Danz
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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