Percentage values in scatterhist histogram

Question

K. 2020-9-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/599713-percentage-values-in-scatterhist-histogram

编辑： Adam Danz 2020-9-28

采纳的回答： Adam Danz

在 MATLAB Online 中打开

Hello all,

I need a help with scatterhist and the information on each histogram.

For example lets have the next plot:

scatterhist(log(rand(1,100)),log(rand(1,100)),'Marker','o','Direction','out');

I would like to add (or get) values above the histogram bars; the percentage of the distribution.

Please, is anyone could help on it?

Thank you

4 个评论
显示 2更早的评论隐藏 2更早的评论

Rik 2020-9-25

If you don't care about the x-y-relation, why don't you simply make a histogram out of each vector separately?

Adam Danz 2020-9-28

编辑：Adam Danz 2020-9-28

"I do not care so much for the plot. Do you know how to calculate?"

I added my answer before seeing that you didn't care about the plot but the answer still shows how to get those percentages. Fortunately the historgrams are already normalized to add up to 1 so you just need to access their "Values" properties and then multiply by 100.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Adam Danz 2020-9-25

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/599713-percentage-values-in-scatterhist-histogram#answer_500413

编辑：Adam Danz 2020-9-25

在 MATLAB Online 中打开

The histograms are normalized which means their bar heights are already a percentage.

The percentage of each bar can be found in the demo below; look for

xHist.Values.*100
yHist.Values.*100

Here's now to access those axes and add text elements.

% Use output to get axis handles
h = scatterhist(log(rand(1,100)),log(rand(1,100)),'Marker','o','Direction','out');
% Get hist axis handles
xHist = findobj(h(2),'Type','histogram'); 
yHist = findobj(h(3),'Type','histogram');
% increase ylim/xlim to make room of text labels
h(2).YLim(2) = h(2).YLim(2).*1.2; % 20% increase;
h(3).YLim(2) = h(3).YLim(2).*1.2; % 20% increase;
% Compute bin centers and labels, add text
xBinCenter = xHist.BinEdges(2:end)-xHist.BinWidth/2;
xHistLabels = compose('%.0f%%',xHist.Values.*100);
text(h(2),xBinCenter, xHist.Values.*1.01, xHistLabels,...
    'HorizontalAlignment', 'Right', 'VerticalAlignment', 'middle', ...
    'FontSize', 8, 'Rotation', 90)
yBinCenter = yHist.BinEdges(2:end)-yHist.BinWidth/2;
yHistLabels = compose('%.0f%%',yHist.Values.*100);
text(h(3),yBinCenter, yHist.Values*1.01, yHistLabels,...
    'HorizontalAlignment', 'Right', 'VerticalAlignment', 'Middle', ...
    'FontSize', 8)