R/i2u.R

In MassSpecWavelet: Mass spectrum processing by wavelet-based algorithms

"i2u" <-
function (i, t0= 9.0E-8, a= 3.36301655051424E8, b= 0, U= 20000, delta= 4.0E-9) {
 t<- i * delta				# in seconds
 u<- (a*(t-t0)^2 + b )*U	# here is m/z at 150KDa
 return (u)
}