how can we represent the histogram of a vector without using the hist function ?
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hi every body how can I represent the histogram of a data vector without using the hist function ? thanks
1 个评论
Yet another series of hints:
doc accumarray
You could think of a solution where you generate the subs argument by using CEIL on the quotient of your dataset and a relevant factor (related to the size of bins); and you use a vector of ones (sized appropriately) as the val argument.
回答（6 个）
the cyclist
2013-5-11
0 个投票
You could use the bar() function.
Image Analyst
2013-5-11
0 个投票
You would essentially have to program up the internals of the histogram function yourself. Very, very easy to do, once you've decided on your bin edge locations. Just think it through in your head and I'm sure you'll know what the code needs to be. It's fairly trivial, so you probably won't need any help.
Andrei Bobrov
2013-5-11
eg
X = randi(20,40,1);
ii = [-inf 0:4:20 inf]
out = sum(bsxfun(@lt,X,ii(2:end))&bsxfun(@ge,X,ii(1:end-1)))
histc(X,ii)
jan
2013-5-11
0 个投票
2 个评论
Image Analyst
2013-5-11
This should have been a comment to Andrei, rather than an "Answer" to your original question. So am I to assume that programming up your own histogram, like I suggested, is too challenging for you?
Randy Souza
2013-5-14
I deleted two less-than-constructive comments here.
@jan: It really makes it easier for other people to follow if, as Image Analyst suggests, you add your reply to an answer as a comment, rather than as a new answer.
Teja Muppirala
2013-5-14
Is it that you just don't want the bar graph that comes up with HIST? If you call it with output arguments, you can get the values without the bar graph.
Then you can just plot those as a line.
data = randn(1,10000);
[N,X] = hist(data,30);
plot(X,N)
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