clust_proportions: Creates cluster proportions and plots from metadata.
In Chris-Cherry/sctools: Single cell analysis tools package

Creates a pdf of pie charts (one for each cluster with proportions from the given metadata) and a csv of raw cell numbers by cluster and metadata. It also uses a permutation based test to determine statistical enrichment of clusters by the given metadata. The stats are returned in the subtitles of the pie charts.

1	clust_proportions(ser, meta, pdf, csv, cols, cluster_enrichment_pvals)

`ser`	Seurat object with clusters and given metadata
`meta`	Name of metadata in ser object to get cluster proportions
`pdf`	Name of output pdf file
`csv`	Name of output csv to save cell numbers by cluster/meta
`cluster_enrichment_pvals`	Boolean for whether to calculate pvals