cf.RegridOperator.tosparse

RegridOperator.tosparse()

Convert the weights to scipy sparse array format in-place.

The weights are converted to Compressed Sparse Row(CSR) array format, i.e. the weights attribute becomes a scipy.sparse._arrays.csr_array object. A CSR array used as the most efficient sparse array type given that we expect no changes to the sparsity structure, and any further modification of the weights to account for missing values in the source grid will always involve row-slicing.

The dst_mask attribute is updated to True for destination grid points for which the weights are all zero.

Returns

None