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## .as.matrix.MassObjectList
## internal function to convert a list of AbstractMassObject objects into a
## matrix
##
## params:
## l: list of AbstractMassObject objects
##
## returns:
## a matrix
.as.matrix.MassObjectList <- function(l) {
.stopIfNotIsMassObjectList(l)
intensity <- .unlist(lapply(l, function(x)x@intensity))
o <- .as.occurrence.list.MassObjectList(l)
m <- matrix(
NA_real_, nrow=length(l), ncol=length(o$mass),
dimnames=list(NULL, o$mass)
)
m[cbind(o$sample, o$i)] <- intensity
attr(m, "mass") <- o$mass
m
}
## .as.binary.matrix
## internal function to convert a matrix with NA to a binary one
##
## params:
## m: matrix
##
## returns:
## a binary matrix
.as.binary.matrix <- function(m) {
if (!is.matrix(m))
stop("'x' has to be a matrix!")
m[] <- !is.na(m)
mode(m) <- "integer"
m
}
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