# NOT RUN {
data(gaschrom)
plot(gaschrom[1,], type = "l", ylim = c(0, 100))
lines(difsm(gaschrom[1,], lambda = 1e5), col = 2)
lines(difsm(gaschrom[1,], lambda = 1e6), col = 3)
lines(difsm(gaschrom[1,], lambda = 1e7), col = 4)
# }
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