meanROIs: The average time series of each ROI

In wonsang/easyFMRI: Functions of fMRI analysis

Description

Computing the average time series of each ROI in the given EPI sequence

Usage

meanROIs(EPIfname, nROIs = 31, ROIdir = "", prefix = "roi_", 
     outfname = "meanROIs", writefile = TRUE)

Arguments

EPIfname	the file name of a EPI sequence (The file format should be ANALYZE such as hdr and img. For example, if the original file is "foo.img", the input value should be "foo".)
nROIs	the number of ROIs. Default is 31.
ROIdir	the directory of ROI definition files. These files should contain the individual zipped NIFTI files (nii.gz) corresponding to ROIs. Default is current working directory.
prefix	the common prefix of ROI definition files. Default is roi_. Then, the files should be titled as roi_1.nii.gz, roi_2.nii.gz, and so forth.
outfname	the outout text file name. Default is meanROIs.
writefile	Enable to write the output text file. Default is TRUE.

Details

This function computes the average time series of each ROI in the given EPI sequence. The ROI definition files should be given a priori.

Value

A matrix of averaged time series for ROIs. Row indicates a time point, and column does an ROI.

Author(s)

Wonsang You

References

Wonsang You (2010) ROI Data Extraction from FMRI BOLD Signals of the Human Brain, Technical Reports of the Leibniz Institute for Neurobiology, TR 10016.

See Also

tsROI

Examples

mts<-meanROIs("foo")

wonsang/easyFMRI documentation built on May 14, 2019, 9:25 p.m.