How to draw negative values ​​on bar when it contains negative values

if my data have negative values

I want to draw the bar values ​​uniformly on the top of the bar chart, like the numbers above 0 on the way, and the values ​​below 0 are all drawn inside the bar chart

clear all ; clc ;clf

yyy = [1 2 3 4 ; 2 3 -4 5 ; -6 -10 5 7 ; -1 -5 8 7]

x = [1:4]

bar1 = bar(x,yyy)

hAx=gca; % get a variable for the current axes handle

% hAx.XTickLabel=str; % label the ticks

hT=[]; % placeholder for text object handles

for i=1:length(bar1) % iterate over number of bar objects

hT=[hT text(bar1(i).XData+bar1(i).XOffset,bar1(i).YData,num2str(bar1(i).YData.','%.3f'), ...

'VerticalAlignment','bottom','horizontalalign','center')];

end

Answer 1

[dpb]

That's a little more tricky and the examples don't illustrate -- but it's not terribly difficult to fix; the problem is 'VerticalAlignment' property needs to be sensitive to the sign of the data. One either has to do a double-index loop or keep the loop by bar handle and then fixup each position in the end...

y =  [1 2 3 4 ; 2 3 -4 5 ; -6 -10 5 7 ; -1 -5 8 7];
hB=bar(y);

% preallocate the text handles for text objects NB bars are by column; but
% text handles are row vector so transpose to preallocate the text object handles
hTxt=gobjects(size(y.')); 
% iterate over bar groups; again NB row vector of text handles returned by text
for i=1:numel(hB)
  hTxt(i,:)=text(hB(i).XData+hB(i).XOffset,hB(i).YData,num2str(hB(i).YData.','%d'), ...
                            'VerticalAlignment','bottom','horizontalalign','center');
end
% now the magic fixup by sign for vertical alignment -- can set all at once after the fact 
set(hTxt((y.'<0)),{'VerticalAlign'},{'top'})
ylim(12*[-1 1])         % make a little more room to put labels inside box

The alternative is one has to write a second loop over the number of YData values in each bar handle and use if/else construct on each value to set the alignment.

[peter huang]

thanks!