Dealing with NaNs in corr function (upper/lower triangles of matrices with same dimension)

Question

julian gaviria 2023-11-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2044097-dealing-with-nans-in-corr-function-upper-lower-triangles-of-matrices-with-same-dimension

评论： the cyclist 2023-11-14

采纳的回答： the cyclist

matrices.mat

在 MATLAB Online 中打开

The correlation coeficients of the upper and lower parts of matrices A,B (see attachment) yield "NaNs

nn=374;
temp= ~eye (nn);
ii_all_conn = find(temp>0);
ii_uptri_conn = find(triu(temp,1)> 0);
ii_lotri_conn = find(tril(temp,-1)> 0);
% Corr plots up entries
figure, plot(A(ii_uptri_conn), B(ii_uptri_conn),'o'), grid on, xlabel('A'), ylabel('B');
[r,p]= corr(A(ii_uptri_conn), B(ii_uptri_conn));
title(['Upper connections - r = ' num2str(r) ' (p ' num2str(p) ')']);
%Corr plots low entries
figure, plot(A(ii_lotri_conn), B(ii_lotri_conn),'o'), grid on, xlabel('A'), ylabel('B');
[r,p]= corr(A(ii_lotri_conn), B(ii_lotri_conn));
title(['Lower connections - r = ' num2str(r) ' (p ' num2str(p) ')']);