SparseBrainVolume-class {neuroim} | R Documentation |
Three-dimensional brain image, backed by a sparseVector
for Matrix
package
Construct a SparseBrainVolume
instance
SparseBrainVolume(data, space, indices = NULL, source = NULL, label = "")
data |
a numeric vector |
space |
an instance of class |
indices |
a index vector indicating the 1-d coordinates of the data values |
source |
an instance of class |
label |
a |
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)