Convolve events with a hemodynamic response function

Convolve events with a hemodynamic response function

Usage

convolve(
  x,
  hrf,
  sampling_frame,
  drop.empty = TRUE,
  summate = TRUE,
  precision = 0.1,
  ...
)

# S3 method for class 'event_term'
convolve(
  x,
  hrf,
  sampling_frame,
  drop.empty = TRUE,
  summate = TRUE,
  precision = 0.3,
  ...
)

Arguments

x

The events to convolve.

hrf

The hemodynamic response function.

sampling_frame

The sampling frame.

drop.empty

Logical indicating whether to drop columns with all zeros.

summate

Logical indicating whether to sum convolved signals.

precision

Numeric specifying the temporal precision for convolution.

...

Additional arguments.

Value

A matrix-like (often tibble) of convolved regressors.

Examples

term <- event_term(
  list(condition = factor(c("A", "B", "A"))),
  onsets = c(0, 5, 10),
  blockids = c(1, 1, 1)
)
sf <- fmrihrf::sampling_frame(blocklens = 20, TR = 1)
conv <- convolve(term, fmrihrf::HRF_SPMG1, sf)
names(conv)
#> [1] "condition.A" "condition.B"