What do the (automatically assigned) colors in a Histogram stand for?

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ramin bba
ramin bba 2014-6-10
评论： ramin bba 2014-6-10
hi,
I have a set of points (nearly 8,000) scattered in a 2D matrix. I calculated the distance between any two of them and then used Histogram to plot it.Here is what I am getting:
I am just wondering what do the colors represent?
It might be helpful to know that:
  • these points are actually the centers of disks (all with the same diameter) and as such cannot get closer to one another beyond the diameter.
  • the matrix is nearly 1500 by 1000
any comment would be appreciated

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José-Luis
José-Luis 2014-6-10
If you do hist() on a 2D array, then you will get an histogram for each column of your array. The bars with the same color will be the histogram for a given column of said array.

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