| bslnoff {PROcess} | R Documentation |
This function estimates the baseline and then removes baseline from the raw spectrum.
bslnoff(f, breaks = 200, qntl = 0, method = c("loess", "approx"), bw = 0.005, plot = FALSE, ...)
f |
a matrix with M/Z values in the first column and intensities in the second column |
breaks |
number of breaks set to M/Z values for finding the local minima or points below a centain quantile of intensities; breaks -1 equally spaced intervals on the log M/Z scale. |
qntl |
if 0, find local minima; if >0 find intensities < qntl*100th quantile locally. |
method |
"loess" or "approx" (linear interpolation). |
bw |
the bandwidth to be passed to loess. |
plot |
TRUE or FALSE, if true, it will plot the raw spectrum, theestimated baseline and the baseline substracted spectrum. |
... |
parameters for plot. |
a matrix of two columns: the first column being the M/Z values same as the input, and the second column being the baseline substracted spectra.
Xiaochun Li
fdat <- system.file("Test", package = "PROcess")
fs <- list.files(fdat, pattern="*csv*", full.names=TRUE)
f1 <- read.files(fs[1])
fcut <- f1[f1[,1]>0,]
bseoff <-bslnoff(fcut,method="loess",plot=TRUE, bw=0.1)
title(basename(fs[1]))