In MATLAB, you can calculate the mean and standard deviation of the non-zero values in a matrix using the following steps:
Step 1: Extract the non-zero values from the matrix.
Step 2: Calculate the mean of the non-zero values.
Step 3: Calculate the standard deviation of the non-zero values.
Here's the MATLAB code to accomplish this:
A = [2 3 5 16; 0 8 7 0; 19 4 6 0; 14 0 0 9];
nonzero_values = A(A ~= 0); % Extract non-zero values from matrix A
mean_value = mean(nonzero_values); % Calculate the mean of non-zero values
std_value = std(nonzero_values); % Calculate the standard deviation of non-zero values
disp("Mean: " + mean_value);
disp("Standard Deviation: " + std_value);
