How to: Control Histogram bin width

10 次查看（过去 30 天）
Hello kity
Hello kity 2013-2-4
Hi
Matlab chooses its own bin width when u use hist().
But I want, for example to make an histogram which makes bins of each 0.5 width. I noticed that hist uses the entire data range as range.
bin_width ( get from edit field)
data=[1:10];
range=max(data)-min(data);
bins= bin_width * range
[n xout]= hist (data, bins)
this still makes random hist where u dont have control over the bins.
what i want is,select the bin_width , 0.5 , plot first bin between 0 - 0.5 , second 0.5- 1 etc.

请先登录，再回答此问题。

采纳的回答

per isakson
per isakson 2013-2-4
Try
doc histc

更多回答（1 个）

Hello kity
Hello kity 2013-2-4
编辑：Hello kity 2013-2-4
I found an answer at google, adjusted some, hope it is useful.
With this code you can manually select the stepsize of the hist bins, for example, stepsize is 1. then it plots a bin from 0-1 ,1- 2 etc. IT also plots the amount of each bin on top of it.
xStep=str2double(get(handles.xstep1,'String')); % edit field where is used a input for xstep
hist(DATA)
xbounds = xlim;
nBins = (xbounds(2)-xbounds(1))/xStep;
edges = linspace(xbounds(1),xbounds(2), nBins+1);
%# compute center of bins (used as x-coord for labels)
bins = ( edges(1:end-1) + edges(2:end) ) / 2;
%# histc
[counts,binIdx] = histc(DATA, edges);
counts(end-1) = sum(counts(end-1:end)); %# combine last two bins
counts(end) = []; %#
% %# plot histogram
bar(edges(1:end-1), counts, 'histc')
for c=1:numel(counts)
if counts(c)~=0
text(bins(c), counts(c)+0.3, num2str(counts(c)), 'FontWeight','bold', 'FontSize',8, ...
'VerticalAlignment','bottom', 'HorizontalAlignment','center');
end
end
set(gca,'ylim',[0 max(counts)+1/10*(max(counts))]); %adjust ymax
end

类别

在 Help Center 和 File Exchange 中查找有关 Histograms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by