finding mean in row wise

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Pat
Pat 2012-11-19
I have values as
D=rand(3,7)
D =
0.5407 0.3181 0.6456 0.5447 0.7210 0.2187 0.0636
0.8699 0.1192 0.4795 0.6473 0.5225 0.1058 0.4046
0.2648 0.9398 0.6393 0.5439 0.9937 0.1097 0.4484
i want to find mean of 3column,next 2 ,next 2
for example
3columns
0.5407 0.3181 0.6456
0.8699 0.1192 0.4795
0.2648 0.9398 0.6393
now want to find mean in row wise ,so i will get
mean1 mean2 mean3
same way i have to do for others also
please help

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采纳的回答

Pedro Villena
Pedro Villena 2012-11-19
编辑：Pedro Villena 2012-11-21
mean1 = mean(D(:,1:3),2),
mean2 = mean(D(:,4:5),2),
mean3 = mean(D(:,6:7),2),
or
D1 = [37.8518 22.2652 45.1886 38.1301 50.4733 15.3074 4.4514;
60.8959 8.3450 33.5624 45.3118 36.5747 7.4059 28.3206;
18.5345 65.7881 44.7522 38.0720 69.5593 7.6788 31.3861];
d = sort(D1,2);
meanData = mean(d(:,1:(end+1)/2:end),2);
meanData =
4.4514 15.3074 22.2652
28.3206 7.4059 8.3450
31.3861 7.6788 65.7881
  1 个评论
Pat
Pat 2012-11-19
编辑：Pat 2012-11-19
ok thanks Pedro another question suppose my data ia
D1 =
37.8518 22.2652 45.1886 38.1301 50.4733 15.3074 4.4514
60.8959 8.3450 33.5624 45.3118 36.5747 7.4059 28.3206
18.5345 65.7881 44.7522 38.0720 69.5593 7.6788 31.3861
in this i have to take first row,i have to choose 3 values,min max and middle value and find the mean with its nearesr values
4.4514 15.3074 22.2652
28.3206 7.4059 8.3450
31.3861 7.6788 65.7881
for this i have to find mean in row wise ,
sane for next two ,and so on till end

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更多回答（1 个）

Walter Roberson
Walter Roberson 2012-11-19
mean(D(:,1:3),2)

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