matlab 统计总结

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方法一：tabulate

TABLE = TABULATE(X), where X is a character array or a cell array    of strings, returns TABLE as a cell array

a =     1     2     3     4     2     3     1>> x = tabulate(a)x =    1.0000    2.0000   28.5714    2.0000    2.0000   28.5714    3.0000    2.0000   28.5714    4.0000    1.0000   14.2857>> x(:,1:2)ans =     1     2     2     2     3     2     4     1

方法二： hist

 N = HIST(Y) bins the elements of Y into 10 equally spaced containers    and returns the number of elements in each container.  If Y is a    matrix, HIST works down the columns.     N = HIST(Y,M), where M is a scalar, uses M bins.     N = HIST(Y,X), where X is a vector, returns the distribution of Y    among bins with centers specified by X.  Note: Use HISTC if it is    more natural to specify bin edges instead.

a =     1     2     3     4     2     3     1>> b = hist(a,unique(a))b =     2     2     2     1>> [unique(a)' b']ans =     1     2     2     2     3     2     4     1

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