Code to reproduce experiments in "Spurious Valleys, NP-hardness, and Tractability of Sparse Matrix Factorization With Fixed Support". In the interest of reproducible research, this is exactly the version of the code used to generate the figures in the paper "Spurious Valleys, Spurious Minima and NP-hardness of Sparse Matrix Factorization With Fixed Support" by the same authors, available at "https://hal.inria.fr/hal-03364668"