plot_pc_variance: Plot PC Variance
In pachterlab/zika: Tools for investigating RNA-Seq

Plot PC variances retained by percentage with option to compare specified PC

1 2	plot_pc_variance(obj, use_filtered = TRUE, units = "est_counts", pca_number = NULL, scale = FALSE, PC_relative = NULL, ...)

`obj`	a `sleuth` object
`use_filtered`	if TRUE, use filtered data. otherwise, use all data
`units`	either 'est_counts' or 'tpm'
`pca_number`	user input on how many PC to display, otherwise default is 5
`scale`	determines scaling
`PC_relative`	gives the option to compare subsequent principal components and their contributions