Nothing
#' Removes negative values from the expression matrix
#'
#' @param x is the flowframe whose expression matrix contains negative values
#' @return flowframe with non-negative values in its expression matrix
#'
#' @examples
#' flowfile_path <- system.file("extdata", "B4_18_1.fcs", package = "cyanoFilter",
#' mustWork = TRUE)
#' flowfile <- flowCore::read.FCS(flowfile_path, alter.names = TRUE,
#' transformation = FALSE, emptyValue = FALSE,
#' dataset = 1) #FCS file contains only one data object
#' flowfile_nona <- cyanoFilter::nona(x = flowfile)
#' noneg(x = flowfile_nona)
#'
#'
#'@importFrom methods new
#'@export noneg
noneg <- function(x) {
dtest <- !apply(flowCore::exprs(x), 1, function(row) any(row <= 0))
exx <- flowCore::exprs(x)[dtest == T, ]
paraa <- x@parameters
describe <- x@description
return(flowCore::flowFrame(exprs = exx, parameters = paraa, description = describe))
}
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