discretize.utils.ddx#
- discretize.utils.ddx(n)[source]#
Create 1D difference (derivative) operator from nodes to centers.
For n cells, the 1D difference (derivative) operator from nodes to centers is sparse, has shape (n, n+1) and takes the form:
\[\begin{split}\begin{bmatrix} -1 & 1 & & & \\ & -1 & 1 & & \\ & & \ddots & \ddots & \\ & & & -1 & 1 \end{bmatrix}\end{split}\]- Parameters:
- n
int Number of cells
- n
- Returns:
- (
n,n+ 1)scipy.sparse.csr_matrix The 1D difference operator from nodes to centers.
- (