SparseBrainVolume-class: SparseBrainVolume
In neuroim: Data Structures and Handling for Neuroimaging Data

Description Usage Arguments Details Value Slots Examples

Three-dimensional brain image, backed by a sparseVector for Matrix package

Construct a SparseBrainVolume instance

1	SparseBrainVolume(data, space, indices = NULL, source = NULL, label = "")

`data`	a numeric vector
`space`	an instance of class `BrainSpace`
`indices`	a index vector indicating the 1-d coordinates of the data values
`source`	an instance of class `BrainSource`
`label`	a `character` string

Image data is backed by Matrix::sparseVector.

SparseBrainVolume instance

data: a sparseVector instance

data <- 1:10
indices <- seq(1,1000, length.out=10)
bspace <- BrainSpace(c(64,64,64), spacing=c(1,1,1))
sparsevol <- SparseBrainVolume(data,bspace,indices=indices)
densevol <- BrainVolume(data,bspace,indices=indices)
sum(sparsevol) == sum(densevol)