finding mean in row wise

Question

Pat 2012-11-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/54113-finding-mean-in-row-wise

采纳的回答： Pedro Villena

在 MATLAB Online 中打开

I have values as

D=rand(3,7)

D =

5407    0.3181    0.6456    0.5447    0.7210    0.2187    0.0636
8699    0.1192    0.4795    0.6473    0.5225    0.1058    0.4046
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

5407    0.3181    0.6456    
8699    0.1192    0.4795  
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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Answer 1

Pedro Villena 2012-11-19

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链接

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https://ww2.mathworks.cn/matlabcentral/answers/54113-finding-mean-in-row-wise#answer_65783

编辑：Pedro Villena 2012-11-21

在 MATLAB Online 中打开

 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

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Pat 2012-11-19

编辑：Pat 2012-11-19

在 MATLAB Online 中打开

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