t test ( not sure if my implementation is correct)

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Alexander Guillen 2023-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/1920565-t-test-not-sure-if-my-implementation-is-correct

评论： Alexander Guillen 2023-2-28

Suppose that I have two groups, N and R. Each group contains four columns which represent different subjects. For example (hypothetically):

N1 = [1:5]' .... N4 = [1:5]' so that N = { N1,N2,N3,N4}

R1 = [1:5]'.... R4 = [1:5]' so that R = {R1...R4}

Is it possible to enable a loop which which can perform the t-test so that I can avoid this manually:

h = ttest(N1,R1);

.

h = ttest(N1,R4);

---

h = ttest(N2,R1);

.

h = ttest(N2,R4); and so on

I understand it may be wrong my implementation of the t-test. But I would like to put into a loop what I just described. Any guidance and help will be appreciated.

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Answer 1

David Hill 2023-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/1920565-t-test-not-sure-if-my-implementation-is-correct#answer_1181910

在 MATLAB Online 中打开

N=randi(100,5,4);%your matrix;
R=randi(100,5,4);%your matrix
h=1;
for n=1:4
    for r=1:4
       H(h)=ttest(N(:,n),R(:,r));
       h=h+1;
    end
end
H
H = 1×16
     0     0     0     0     0     0     0     0     0     0     0     0     0     1     0     0