dti (version 0.8-1)

extract-methods: Methods for Function `extract' and `[' in Package `dti'

Description

The methods extract and/or compute specified statistics from object of class "dtiData", "dtiTensor", and "dtiIndices". This can be restricted to a subset of voxel.

Usage

## S3 method for class 'dtiData':
extract(x, what="data", xind=TRUE, yind=TRUE, zind=TRUE)
  ## S3 method for class 'dtiTensor':
extract(x, what="tensor", xind=TRUE, yind=TRUE, zind=TRUE)
  ## S3 method for class 'dtiIndices':
extract(x, what=c("fa","andir"), xind=TRUE, yind=TRUE, zind=TRUE)
  ## S3 method for class 'dwiQball':
extract(x, what="sphcoef", xind=TRUE, yind=TRUE, zind=TRUE)
  ## S3 method for class 'dtiData':
[(x, i, j, k, drop=FALSE)
  ## S3 method for class 'dtiTensor':
[(x, i, j, k, drop=FALSE)
  ## S3 method for class 'dtiIndices':
[(x, i, j, k, drop=FALSE)
  ## S3 method for class 'dwiQball':
[(x, i, j, k, drop=FALSE)

Arguments

x

Object of class dti

i

vector of x-coordinates, defaults to whole range.

j

vector of y-coordinates, defaults to whole range.

k

vector of z-coordinates, defaults to whole range.

xind

vector of x-coordinates, defaults to whole range.

yind

vector of y-coordinates, defaults to whole range.

zind

vector of z-coordinates, defaults to whole range.

what

Statistic to extract. See Methods Section for details.

drop

unused.

Value

• For function extract a list with components carrying the names of the options specified in argument what. For indexing function, the cutted object.

See Also

dtiData, dtiTensor, dtiIndices dwiQball