Simple filter for removing noise in single-cell data.
reduceNoise(cellmat, noisefilter = 2, noisefraction = 0.25)Filtered mean gene expression matrix with genes in rows and cell types in columns.
Matrix of log2 mean gene expression in rows with cell types in columns.
Sets an upper bound for noisefraction cut-off below
which gene expression is set to 0. Essentially gene expression above this
level must be retained in the signature. Setting this higher can allow more
suppression via noisefraction and can favour more highly expressed genes.
Numeric value. Maximum mean log2 gene expression across
cell types is calculated and values in celltypes below this fraction are
set to 0. Set in conjunction with noisefilter. Note: if this is set too
high (too close to 1), it can have a deleterious effect on deconvolution.