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
hrffunction.
Value
A function representing the lagged HRF. If lag is a vector of lags, the function returns an HRF set.
See also
Other gen_hrf:
gen_hrf_blocked(),
gen_hrf_library(),
gen_hrf_set()
Other gen_hrf:
gen_hrf_blocked(),
gen_hrf_library(),
gen_hrf_set()
Examples
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