Level a breech face impression surface matrix by a conditional statistic

preProcess_removeTrend(x3p, statistic = "mean", ...)

Arguments

x3p: an x3p object containing the surface matrix of a cartridge case scan
statistic: either "mean" or "quantile"
...: arguments to be set in the quantreg::rq function if statistic = "quantile" is set. In this case, tau = .5 and method = "fn" are recommended

Value

an x3p object containing the leveled cartridge case scan surface matrix.

Examples


#Process fadul1.1 "from scratch" (takes > 5 seconds to run)
if (FALSE) {
nbtrd_link <- "https://tsapps.nist.gov/NRBTD/Studies/CartridgeMeasurement/"
fadul1.1_link <- "DownloadMeasurement/2d9cc51f-6f66-40a0-973a-a9292dbee36d"

fadul1.1 <- x3ptools::read_x3p(paste0(nbtrd_link,fadul1.1_link))
fadul1.1_extCropped <- preProcess_crop(x3p = fadul1.1,
                                       region = "exterior",
                                       radiusOffset = -30)

fadul1.1_intCroped <- preProcess_crop(x3p = fadul1.1_extCropped,
                                      region = "interior",
                                      radiusOffset = 200)

fadul1.1_leveled <- preProcess_removeTrend(x3p = fadul1.1_intCroped,
                                           statistic = "quantile",
                                           tau = .5,
                                           method = "fn")

x3pListPlot(list("Original" = fadul1.1,
                 "Ext. Cropped" = fadul1.1_extCropped,
                 "Ext. & Int. Cropped" = fadul1.1_intCroped,
                 "Cropped and Leveled" = fadul1.1_leveled))
}