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在matlab中mean函数是求均值的,mean(x,dim)
如果你有这样一个矩阵:A = [1 2 3; 3 3 6; 4 6 8; 4 7 7];
用mean(A)(默认dim=1)就会求每一列的均值
ans =
3.0000 4.5000 6.0000
用mean(A,2)就会求每一行的均值
ans =
2.0000
4.0000
6.0000
6.0000
std(A):求标准差,A必须为double型
>> A=[26.20 26.20 26.21 26.23 26.19 26.22 26.21 26.19 26.09 26.22 26.20 26.21 26.23 26.21 26.18]
A =
Columns 1 through 8
26.2 26.2 26.21 26.23 26.19 26.22 26.21 26.19
Columns 9 through 15
26.09 26.22 26.2 26.21 26.23 26.21 26.18
>> a=mean(A,2)
a =
26.199
>> b=std(A)
b =
0.033481
>>
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