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请问如何实现二维数组第一列相同数字的行求平均。
a=[1 2;1 4;2 3;2 5;3 4;3 7;3 1]; %% 方法1 index =unique(a(:,1)); JG=[]; for i =1:length(index) JG=[JG;[index(i),mean(a(a(...
3 years ago | 0
| accepted
