ncdfFlow (version 2.18.0)

[[,ncdfFlowSet,ANY-method: extract a flowFrame object from ncdfFlowSet

Description

Simliar to [[, and there are cerntain ways to reduce the disk IO and optimize the speed.

Usage

"[["(x, i, j, use.exprs = TRUE, ...)
"[["(x, i, j, ...)
"[["(x, i, j, ...)
"[["(x, i, j, ...)

Arguments

x

a ncdfFlowSet or ncdfFlowList

i

a numeric or character used as sample index

j

a numeric or character used as channel index

use.exprs

a logical scalar indicating whether to read the actual data from cdf

...

other arguments. not used.

Examples

data(GvHD)
nc <- ncdfFlowSet(GvHD[1:2])
samples <- sampleNames(nc)
sn <- samples[1]
#return the entire flowFrame
fr <- nc[[sn]]

#access the flowFrame meta data without loading the raw event data from disk
nc[[sn, use.exprs = FALSE]]

#only read a subset of channels (more efficient than reading entire data set)
nc[[sn, 1:2]]