how to calculate the number of positive normalized elements in the system in matlab

Assuming you have a matrix A, you can count the number of positive normalized elements in the following way:

main.m
% generate a random matrix A
A = randn(5,5);
% count the number of positive normalized elements in A
count = sum(sum(A > 0 & A./max(max(abs(A))) >= eps));
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In the above code, A > 0 checks if each element of A is positive, A./max(max(abs(A))) normalizes the elements of A by dividing each element by the maximum absolute value of A, and eps is the smallest value that can be represented in MATLAB. Finally, sum(sum(...)) sums up all elements of the resulting logical matrix.

The variable count will contain the number of positive normalized elements in the matrix A.