How to find the mean of a column in a matrix using for loop?

Question

Hunter Nau 2022-4-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700070-how-to-find-the-mean-of-a-column-in-a-matrix-using-for-loop

评论： KSSV 2022-4-19

For part B I have to use for loop to find the average of each column. I am getting the correct output but I am getting 5 of the same outputs. For part C I need to find the mean of all the temperatures, but I keep getting answers from 1:5.

%% Part A
TempSenVal=[58.3 59.2 60.2 63.0 63.3; 62.5 63.8 64.9 65.2 65.8;...
    63.2 64.2 65.3 67.8 67.9; 64.0 65.1 67.8 68.2 69.1; 65.5 66.0 67.9 68.9 70.2]
%% Part B
for k=TempSenVal
mean(TempSenVal);
end
%% Part C
n=length(TempSenVal);
for k=TempSenVal
mean(n);
end

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Answer 1

KSSV 2022-4-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700070-how-to-find-the-mean-of-a-column-in-a-matrix-using-for-loop#answer_946045

在 MATLAB Online 中打开

TempSenVal=[58.3 59.2 60.2 63.0 63.3; 62.5 63.8 64.9 65.2 65.8;...
    63.2 64.2 65.3 67.8 67.9; 64.0 65.1 67.8 68.2 69.1; 65.5 66.0 67.9 68.9 70.2] ;
[m,n] = size(TempSenVal) ;
M = zeros(1,n) ; 
for i = 1:n
    M(i) = mean(TempSenVal(:,i)) ; 
end
% just use mean 
M
M = 1×5
   62.7000   63.6600   65.2200   66.6200   67.2600
mean(TempSenVal)
ans = 1×5
   62.7000   63.6600   65.2200   66.6200   67.2600