Generate a Lagged HRF Function

The `gen_hrf_lagged` function takes an HRF function and applies a specified lag to it. This can be useful for modeling time-delayed hemodynamic responses.

Usage

gen_hrf_lagged(hrf, lag = 2, normalize = FALSE, ...)

hrf_lagged(hrf, lag = 2, normalize = FALSE, ...)

Arguments

hrf

A function representing the underlying HRF to be shifted.

lag

A numeric value specifying the lag or delay in seconds to apply to the HRF. This can also be a vector of lags, in which case the function returns an HRF set.

normalize

A logical value indicating whether to rescale the output so that the maximum absolute value is 1. Defaults to `FALSE`.

...

Extra arguments supplied to the `hrf` function.

Value

A function representing the lagged HRF. If `lag` is a vector of lags, the function returns an HRF set.

an lagged hrf function

Functions

• hrf_lagged(): alias for gen_hrf_lagged

See also

Other gen_hrf: gen_hrf_blocked()

Other gen_hrf: gen_hrf_blocked()

Examples

# \donttest{
hrf_lag5 <- gen_hrf_lagged(HRF_SPMG1, lag=5)
hrf_lag5(0:20)
#>  [1] 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000
#>  [7] 0.030644357 0.360749730 1.007784768 1.562306838 1.753945621 1.605440375
#> [13] 1.276104046 0.914165872 0.603787442 0.372395071 0.215170462 0.115290241
#> [19] 0.055163173 0.020765904 0.002277497
# }