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Select frame features using feature metadata

Source: R/frame-view.R
select_features.Rd

Select frame features using feature metadata

Usage

select_features(x, predicate)

Arguments

x

An fmri_frame or view.

predicate

A metadata expression returning one logical value per feature.

Value

An fmri_view.

Examples

sp <- volume_space(dim = c(2, 2, 2), affine = diag(4))
frame <- fmri_frame(
  assays = list(bold = matrix(rnorm(4 * n_features(sp)), nrow = 4)),
  observations = data.frame(.obs_id = sprintf("vol-%d", 1:4)),
  space = sp
)
select_features(frame, i == 1)
#> <fmri_view> 4 observations x 4 features
#>   base: 4 x 8 
#>   assays: bold