RemoveSparseFeatures: Removes features with a lot of 0 counts

In CountClust: Clustering and Visualizing RNA-Seq Expression Data using Grade of Membership Models

Description

This function deals with zero counts in the counts dataset. If for a feature, the proportion of zeros across the samples is greater than filter_prop, then we remove the feature.

Usage

RemoveSparseFeatures(data, filter_prop = 0.9)

Arguments

data	count data in a sample by feature matrix.
filter_prop	threshold proportion. If the proportion of zeros for the feature exceeds this threshold then we remove the feature altogether. Default is 0.9.

Value

Returns a list with

data	filtered data with sparse features removed
sparse_features	the feature names of the features found sparse and removed

Examples

mat <- rbind(c(2,0,3,0,4),c(4,5,5,0,0),c(30,34,63,25,0),c(0,0,0,0,0));
RemoveSparseFeatures(mat, filter_prop = 0.5)
RemoveSparseFeatures(mat)

CountClust documentation built on Nov. 8, 2020, 5:01 p.m.