covind_gen: Coverage indicator generation
In koohyun-kwon/HTEBandSim: What the Package Does (One Line, Title Case)

Coverage indicator generation

covind_gen(
  eval,
  cb.l,
  cb.u,
  reg.name = c("AK", "AK.bin", "custom"),
  reg.spec,
  M,
  cvar.spec = NULL,
  scale = NULL,
  custom.fx = NULL
)

`eval`	a vector of evaluation points in the support of the regressor
`cb.l`	a vector of lower confidence band values
`cb.u`	a vector of upper confidence band values
`reg.name`	class of regression functions to be used; `"AK"` denotes regression functions in Section 5 of Armstrong and Kolesár (2020); `"AK.bin"` denotes denotes the case where y = 1(f(x) + u > 0), using regression functions in Section 5 of Armstrong and Kolesár (2020), where u is a normal random variable.
`reg.spec`	a number denoting the type of regression function among the class of functions chosen in `reg.name`.
`M`	bound on the second derivative
`cvar.spec`	specification for conditional variance function, one of `c("homo", "het.AK")`.
`scale`	scale parameter, a positive constant multiplied to the noise.
`custom.fx`	a vector of custom f(x) values