arf3DS4 (version 2.5-4)

roiConnectivity: calculate Connectivity with spatial averaging

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.

See Also

model, arfcorrelation, fitConnectivity, setIsoContour