Visualize correlation matrix using correlogram - Easy Guides - Wiki - STHDA
Scatter Plot Matrices - R Base Graphs - Easy Guides - Wiki - STHDA
SNAP/wiki-Talk sparse matrix
Adjacency matrix - Wikipedia
Matrix multiplication - Wikipedia
Adjacency matrix | Graph Online Wiki
SNAP/wiki-Vote sparse matrix
Adjacency matrix | Graph Online Wiki
How to Solve Matrices (with Pictures) - wikiHow
TIL matrix means womb ("mat" prefix) and a place to culture bacteria as they grow, in addition to the computing definitions (via https://en.wiktionary.org/wiki/matrix). Absolutely appropriate to the plot! : r/matrix