which_proc: (One-sided) Procedure choice
In soonwookwon/rdadapt: What the Package Does (One Line, Title Case)

Calculates the adaptive procedure "closest" to the oracle one

1 2	which_proc(Cgrid, gamma, C, Xt, Xc, mon_ind, sigma_t, sigma_c, lower, alpha, procmat, ProcNames, Nsim_proc, rhofun = c("diff", "ratio"))

`gamma`	length two vector of gammas ((γ_1, γ_2)')
`C`	length two vector of Cs ((C_1, C_2)')
`Xt`	n_t \times k design matrix for the treated units
`Xc`	n_c \times k design matrix for the control units
`mon_ind`	indice of the monotone variables
`sigma_t`	standard deviation of the error term for the treated units (either length 1 or n_t)
`sigma_c`	standard deviation of the error term for the control units
`lower`
`alpha`
`rhofun`	corresponds to ρ in our documentation