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Create Fourier HRF Basis Set

Source: R/hrf.R
hrf_fourier_generator.Rd

Generates an HRF object using Fourier basis functions (sine and cosine pairs) with custom parameters.

Usage

hrf_fourier_generator(nbasis = 5, span = 24)

Arguments

nbasis

Number of basis functions (default: 5). Should be even for complete sine-cosine pairs.

span

Temporal window in seconds (default: 24)

Value

An HRF object of class c("Fourier_HRF", "HRF", "function")

Details

The Fourier basis uses alternating sine and cosine functions with increasing frequencies. This provides a smooth, periodic basis set that can capture oscillatory components in the HRF.

See also

HRF_objects for pre-defined HRF objects, getHRF for a unified interface to create HRFs

Examples

# Create Fourier basis with 8 functions
custom_fourier <- hrf_fourier_generator(nbasis = 8)
#> Warning: Parameters nbasis, span are not arguments to function fourier and will be ignored
t <- seq(0, 24, by = 0.1)
response <- evaluate(custom_fourier, t)
matplot(t, response, type = "l", main = "Fourier HRF with 8 basis functions")