Convert Poisson Matrix Factorization to Multinomial Topic model. The same idea was first coined by fastTopics paper.

Convert Poisson Matrix Factorization to Multinomial Topic model. The same idea was first coined by fastTopics paper.

Usage

pmf2topic(.beta, .theta, eps = 1e-08)

Arguments

.beta

D x K dictionary matrix

.theta

N x K sample-wise factor loading matrix

Value

a list of (beta, prop, depth), where the beta is a re-scaled dictionary matrix, each row of the prop matrix corresponds to a mixing proportion per column, and the depth parameter gauges a sequencing depth for each column

Details

EY|.beta, .theta = .beta %*% t(.theta)