def standardize_genes(self, inplace=False):
matrix = self.center_genes(inplace=inplace)<EOL>matrix.X[:,:] = matrix.X /np.tile(np.std(matrix.X, axis=<NUM_LIT:1>, ddof=<NUM_LIT:1>), (matrix.n, <NUM_LIT:1>)).T<EOL>return matrix<EOL>
Standardize the expression of each gene (row).