count bins
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Hello, i need help in counting bins. I have this command in mathematica:
nBin = BinCounts[dataX, {-5 sX, 5 sX, step}]
,where datax is a matrix. How can i possible write it in matlab?
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Matt Fig
2011-2-12
0 个投票
I think you might need to use the HISTC function. Have a look at the help to see if it meets your needs.
7 个评论
George
2011-2-12
Walter Roberson
2011-2-12
It appears the equivalent would be
histc(dataX(:), -5*sX:step:5*sX)
but watch out for the boundary conditions.
Walter Roberson
2011-2-12
No, in histc() you supply the bin boundaries. It is hist() that you can supply bin counts.
Matt Tearle
2011-2-13
Both HIST and HISTC will return bin counts, for a given vector of bin divisions. The difference is whether you specify the bin edges or centers.
Walter Roberson
2011-2-13
Yes, but hist() allows you to specify just the number of bins; hist(X) uses nbins = 10, hist(X,nbins) with nbins a scalar uses that number, hist(X,y) with y a vector uses the given y values as the centers of bins. The algorithm for determining the boundaries of the bins given the number of them is not described in the hist() documentation.
histc() has no mode in which one can give the number of bins: it can only be used in the mode where one specifies the edges of bins. histc(x,y) with y a scalar would count the number of values in x that are exactly equal to the scalar y, as in sum(x==y) .
George
2011-2-13
Matt Tearle
2011-2-13
@WR: sorry, I missed George's first comment, so I missed the context of the discussion. Another thing to add to wish list, I think...
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