Sparse matrix calculate warning: Matrix is close to singular or badly scaled.

I am using two around 9 million sparse matrix to do a sample calculation. MATLAB is giving me this warning. How should I correct this?

>> displacement = K_matrix_sys\F_matrix;

Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.326659e-16.

K_matrix_sys is sysmetric matrix, F_matrix is same size array. How should I fix this? Where should I start to check with?

[Walter Roberson]

what does sprank() report for the matrix?

[Benyang Hu]

report a number 9480516. This is the size of matrix

Answer 1

[Mohammed Hamaidi]

You don't have to correct any thing.

The matrix is ​​close to singular (the determinant close to zero)

Matlab indicate that Results may be inaccurate.

The problem is in the matrix itself