entry.value {geometry} | R Documentation |
entry.value
retrieves or sets the values in an array a
at the positions indicated
by the rows of a matrix idx
.
entry.value(a, idx) entry.value(a, idx) <- value
a |
An array. |
idx |
Numerical matrix with the same number of columns as the number of dimensions of a .
Each row indices a cell in a of which the value is to be retrieved or set. |
value |
{ An array of length nrow(idx)
. }
entry.value(a,idx)
returns a vector of values at the indicated cells.
entry.value(a,idx) <- val
changes the indicated cells of a
to val
.
Raoul Grasman
a = array(1:(4^4),c(4,4,4,4)) entry.value(a,cbind(1:4,1:4,1:4,1:4)) entry.value(a,cbind(1:4,1:4,1:4,1:4)) <- 0 entry.value(a, as.matrix(expand.grid(1:4,1:4,1:4,1:4))) # same as `c(a[1:4,1:4,1:4,1:4])' which is same as `c(a)'