R Under development (unstable) (2024-01-28 r85838 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> suppressMessages(library(cobs))
> 
> options(digits = 6)
> ## pdf("ex3.pdf")
> 
> data(women) # 15 obs.
> attach(women)
> 
> ## Interpolation! very easy problem,   BUT :
> try( ## gives  "ifl = 5" !!!!!
+ cobw <- cobs(weight, height, knots = weight, nknots = length(weight))
+ )
Warning message:
In cobs(weight, height, knots = weight, nknots = length(weight)) :
  The number of knots can't be equal to the number of unique x for degree = 2.
'cobs' has automatically deleted the middle knot.
> 
> cat('Time elapsed: ', proc.time(),'\n') # for ``statistical reasons''
Time elapsed:  1.73 0.21 1.92 NA NA 
> 
> proc.time()
   user  system elapsed 
   1.73    0.21    1.92