Control object to enable the optional sketched GLM engine.
Usage
lowrank_control(
parcels = NULL,
landmarks = NULL,
k_neighbors = 16L,
time_sketch = list(method = "gaussian", m = NULL, iters = 0L),
ncomp = NULL,
noise_pcs = 0L
)Arguments
- parcels
Optional parceling, e.g., a neuroim2::ClusteredNeuroVol or integer vector (length = number of voxels in mask).
- landmarks
Optional integer; number of landmark voxels for optional Nyström extension (NULL = off).
- k_neighbors
Integer; k for k-NN in Nyström extension.
- time_sketch
List(method = "gaussian" | "countsketch", m = NULL, iters = 0L).
- ncomp
Optional integer; number of latent components within parcels (PCA).
- noise_pcs
Integer; optional GLMdenoise-style PCs from low-R2 parcels.