SimPEG.utils.av

SimPEG.utils.av(n)

Create 1D averaging operator from nodes to cell-centers.

For n cells, the 1D averaging operator from nodes to centerss is sparse, has shape (n, n+1) and takes the form:

$$\begin{array}{r}\begin{array}{c}\left[\begin{array}{ccccc}1/2& 1/2& & & \\ & 1/2& 1/2& & \\ & & \ddots & \ddots & \\ & & & 1/2& 1/2\end{array}\right]\end{array}\end{array}$$

Parameters

nint

Number of cells

Returns

(n, n + 1) scipy.sparse.csr_matrix

The 1D averaging operator from nodes to centers.