Add two rows in a matrix with new datas

Question

Frederike Petersen 2021-10-6

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https://ww2.mathworks.cn/matlabcentral/answers/1467676-add-two-rows-in-a-matrix-with-new-datas

评论： Frederike Petersen 2021-10-6

I have a pascal triangle matrix pascal(10) = E. Now I have to calculate the mean and the standard deviation of each column of E. The results have to insert as row 6&7 in Matrix E. (At the end the matrix should have [12 10]).

Thanks for your advices!

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Answer 1

C B 2021-10-6

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https://ww2.mathworks.cn/matlabcentral/answers/1467676-add-two-rows-in-a-matrix-with-new-datas#answer_802366

编辑：C B 2021-10-6

在 MATLAB Online 中打开

you can do this in below way

E = pascal(10);
k = 5; 
E = [E(1:k,:); std(E); E(k+1:end,:)];
k = 6; 
E = [E(1:k,:); mean(E); E(k+1:end,:)];

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Frederike Petersen 2021-10-6

Thanks for your response!! :)

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Answer 2

KSSV 2021-10-6

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https://ww2.mathworks.cn/matlabcentral/answers/1467676-add-two-rows-in-a-matrix-with-new-datas#answer_802371

在 MATLAB Online 中打开

E = pascal(10) ; 
iwant = [E ; mean(E) ; std(E)]
iwant = 12×10
           1           1           1           1           1           1           1           1           1           1
           1           2           3           4           5           6           7           8           9          10
           1           3           6          10          15          21          28          36          45          55
           1           4          10          20          35          56          84         120         165         220
           1           5          15          35          70         126         210         330         495         715
           1           6          21          56         126         252         462         792        1287        2002
           1           7          28          84         210         462         924        1716        3003        5005
           1           8          36         120         330         792        1716        3432        6435       11440
           1           9          45         165         495        1287        3003        6435       12870       24310
           1          10          55         220         715        2002        5005       11440       24310       48620