www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/AccumulateDataExample.m
%% Accumulate Data %% % Create a vector of data, |val|, and a vector of subscript values with % the same length, |subs|. val = 101:105'; subs = [1; 3; 4; 3; 4] %% % Use |accumarray| to sum the values in |val| that have identical subscripts % in |subs|. A = accumarray(subs,val) %% % The result is a vector of accumulated values. Since the second and fourth % elements of |subs| are equal to 3, |A(3)| is the sum of the second and % fourth elements of |val|, that is, |A(3) = 102 + 104 = 206|. Also, |A(2) % = 0| because |subs| does not contain the value |2|. Since |subs| is a % vector, the output, |A|, is also a vector. The length of |A| is |max(subs,[],1)|.