# Convert multiple listw graphs into a single sparse adjacency matrix

Source:`R/spatial-misc.R`

`multi_listw2sparse.Rd`

Each sample in the SFE object has a separate spatial neighborhood graph. Spatial analyses performed jointly on multiple samples require a combined spatial neighborhood graph from the different samples, where the different samples would be disconnected components of the graph. This combined adjacency matrix can be used in MULTISPATI PCA.