How to select top 100 features(a subset) which are most relevant after pca?

Question

I performed PCA on a 63*2308 matrix and obtained a score and a co-efficient matrix. The score matrix is 63*2308 and the co-efficient matrix is 2308*2308 in dimensions.

Answer 1

Have you tried with

B = sort(your_matrix,2,'descend');
C = B(:,1:100);