roiConnectivity: calculate Connectivity with spatial averaging

In arf3DS4: Activated Region Fitting, fMRI data analysis (3D).

Description

Calculates functional connectivity based on the spatial average of the voxels within the isoContours of the estimated model.

Usage

roiConnectivity(arfmodel,roidata=setIsoContour(arfmodel,95),
 funcfilename='single_events.nii.gz',type=c('avg','ev'), 
 evmodel=c('spatial','spatiotemporal','eigenvariate'))

Arguments

arfmodel	An ARF model object (class model).
roidata	fmri.data object containing ROIs for each region (must contain a volume for each region), can be obtained via setIsoContour.
funcfilename	Filename of the volume to extract the single-trial data.
type	Average using no weighing ('avg') or by weighing with the first spatial eigenvector ('ev').
evmodel	Which data is used to calculate the first spatial eigenvector: 'spatial', 'spatiotemporal', or 'eigenvariate'.

Value

Returns an object of class arfcorrelation including the region by time matrix of amplitude time-series and the estimated correlations.

Author(s)

Wouter D. Weeda - [e-mail]

See Also

model, arfcorrelation, fitConnectivity, setIsoContour

arf3DS4 documentation built on May 2, 2019, 8:19 a.m.