# multi bar labeling plot

조회 수: 54 (최근 30일)
Ali Ali 2019년 5월 16일
편집: Adam Danz 2021년 12월 10일
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.
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Adam Danz 2019년 5월 16일
Wouldn't a legend defining the colors make more sense?
Ali Ali 2019년 5월 16일
you are right.. but i'll manopolate with the colors later.. so it will not be fixed as it now.

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### 채택된 답변

Adam Danz 2019년 5월 16일
편집: Adam Danz 2021년 12월 10일
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 2019년 5월 19일
편집: Adam Danz 2019년 5월 19일
% 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 2019년 5월 20일
thank you a lot Adam.. this is realy helped me.

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### 추가 답변 (2개)

Sulaymon Eshkabilov 2019년 5월 16일
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.
##### 댓글 수: 1이전 댓글 -1개 표시이전 댓글 -1개 숨기기
Ali Ali 2019년 5월 17일
Sulaymon Eshkabilov i think you did not get my point.. anyway thank you for your help.

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Sergio Yanez-Pagans 2021년 8월 21일
##### 댓글 수: 1이전 댓글 -1개 표시이전 댓글 -1개 숨기기
Adam Danz 2021년 8월 21일
Cool function, but how does that address the question of how to label the bar groups?

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