vgam

I am using following example from help pages of package VGAM library(VGAM) fit4 <- vgam(BMI ~ s(age, df = c(4, 2)), lms.bcn(zero = 1), data = bmi.nz, trace = TRUE) qtplot(fit4, percentiles = c(5,50,90,99), main = "Quantiles", las = 1, xlim = c(15, 90), ylab = "BMI", lwd = 2, lcol = 4) I am getting a proper graph with it: How can I avoid plotting points from the graph? Also I need to print out values for these percentiles at each of ages 20,30,40...80 (separately as a table). How can this be done? Can I use ggplot() format command rather than qtplot() command here? Thanks for your help. How