Subset PhysioExperiment by time indices

Extracts a subset of the PhysioExperiment by row (time) and/or column (channel) indices, preserving all metadata.

Usage

# S4 method for class 'PhysioExperiment,ANY,ANY,ANY'
x[i, j, ..., drop = FALSE]

Arguments

x

A PhysioExperiment object.

i

Time indices (rows).

j

Channel indices (columns in first non-time dimension).

...

Additional arguments (not used).

drop

Logical. If TRUE, drops dimensions of size 1.

Value

A PhysioExperiment object containing only the selected time points and/or channels, with updated rowData and colData.

References

Huber, W., et al. (2015). "Orchestrating high-throughput genomic analysis with Bioconductor." Nature Methods, 12(2), 115-121. doi:10.1038/nmeth.3252

Morgan, M., et al. (2022). "S4Vectors: Foundation of vector-like and list-like containers in Bioconductor." R package.

See also

extractWindow for subsetting by time in seconds, pickChannels for subsetting by channel name, dropChannels for removing specific channels

Examples

pe <- PhysioExperiment(
  assays = list(raw = matrix(rnorm(400), nrow = 100, ncol = 4)),
  samplingRate = 100
)

# Subset by time
pe_subset <- pe[1:50, ]
dim(pe_subset)  # 50 4
#> [1] 50  4

# Subset by channels
pe_channels <- pe[, 1:2]
dim(pe_channels)  # 100 2
#> [1] 100   2