fitHSA_ray_boot: bootstrap of fitHSA_ray to obtain variation of deltaAUC
In lshen1/drexplorer2: Dose-response Explorer2

bootstrap of fitHSA_ray to obtain variation of deltaAUC

fitHSA_ray_boot(
  d1,
  d2,
  e,
  tol = 0.05,
  strict = TRUE,
  name1 = "Drug A",
  name2 = "Drug B",
  dmin = NULL,
  dmax = NULL,
  islogd = TRUE,
  bootstrapB = 10,
  nrep = 3,
  seed = 100
)

`d1`	drug 1 dose in original scale.
`d2`	drug 2 dose in original scale.
`e`	response at the dose pair.
`tol`	tolerance in declaring fixed ratio.
`strict`	whether to stop if not fixed ratio; this is just for visualization; the calculations of synergy is wrong since d12 = d1+d2 is meaningless for variable ratio! At the end, this is a waste of time: it would not make sense and impossible to do this!
`name1`	drug 1 name.
`name2`	drug 2 name.
`dmin`	start position to calcualte AUC at projected dose, in original scale, default is minimum projected dose.
`dmax`	end position to calcualte AUC at projected dose, in original scale, default is maximum projected dose.
`islogd`	whether to compute AUC at log10 dose; if TRUE, dmin and dmax must also be log10 scale.
`bootstrapB`	number of boostrap iterations.
`nrep`	how many replicates are sampled with replacement for each dose combination. nrep=3 will make it much narrower CI band.
`seed`	random seed. Dafault is set to 100.