我有一个两列的矩阵，我如何使每21行相关

Question

我想把这些放到一个循环中:

r1 = corr(a(1:21,1),a(1:21,2),'type','Pearson');
r2 = corr(a(22:42,1),a(22:42,2),'type','Pearson');
r3 = corr(a(43:63,1),a(43:63,2),'type','Pearson');

Answer 1

% Pre-allocate according to the size of the output
for k=1:3
   r(:,:,k) = corr(a(21*k-20:21*k,1),a(21*k-20:21*k,2),'type','Pearson');
end