not all `alg` functors have implementations for all four versions of `measure_rv_from_ccf`

[hematthi]

EchelleCCFs.jl/src/calc_rv/common.jl

Lines 27 to 57 in a639217

	"""
	`measure_rv_from_ccf(vels, ccf, [ccf_var]; alg )`
	Return estimated RV based on the CCF using specified algorithm object.
	Inputs:
	* `vels`: Array of velocites where CCF was evaluated.
	* `ccf`: Array of values of CCF
	Optional Arguements:
	* `alg`: Functor specifying how to measure the RV and it's uncertainty from the CCF. Options include:
	MeasureRvFromCCFGaussian (default), MeasureRvFromCCFQuadratic, MeasureRvFromCCFCentroid, and MeasureRvFromMinCCF.
	"""
	function measure_rv_from_ccf end
	function measure_rv_from_ccf(vels::A1, ccf::A2, ; alg::AlgT=MeasureRvFromCCFGaussian() ) where {
	T1<:Real, A1<:AbstractArray{T1,1}, T2<:Real, A2<:AbstractArray{T2,1}, AlgT<:AbstractMeasureRvFromCCF }
	return alg(vels,ccf)
	end
	function measure_rv_from_ccf(vels::A1, ccf::A2, ccf_var::A3 ; alg::AlgT=MeasureRvFromCCFGaussian() ) where {
	T1<:Real, A1<:AbstractArray{T1,1}, T2<:Real, A2<:AbstractArray{T2,1}, T3<:Real, A3<:AbstractArray{T3,1}, AlgT<:AbstractMeasureRvFromCCF }
	return alg(vels,ccf,ccf_var)
	end
	function measure_rv_from_ccf(vels::A1, ccf::A2, ccf_var::A3 ; alg::AlgT=MeasureRvFromCCFGaussian() ) where {
	T1<:Real, A1<:AbstractArray{T1,1}, T2<:Real, A2<:AbstractArray{T2,1}, T3<:Real, A3<:AbstractArray{T3,2}, AlgT<:AbstractMeasureRvFromCCF }
	return alg(vels,ccf,ccf_var)
	end
	function measure_rv_from_ccf(vels::A1, ccf::A2, ccf_var::A3, covar_base::A4 ; alg::AlgT=MeasureRvFromCCFGaussian() ) where {
	T1<:Real, A1<:AbstractArray{T1,1}, T2<:Real, A2<:AbstractArray{T2,1}, T3<:Real, A3<:AbstractArray{T3,1}, T4<:Real, A4<:AbstractArray{T4,2}, AlgT<:AbstractMeasureRvFromCCF }
	return alg(vels,ccf,ccf_var,covar_base)
	end

MeasureRvFromCCFGaussian does not have version with covar_base argument
MeasureRvFromCCFQuadratic does not have versions with ccf_covar argument and covar_base argument
MeasureRvFromCCFCentroid only has version with ccf_var argument
MeasureRvFromMinCCF only has first version

[eford]

Since trying to use something that doesn't exist will give an error, I removed bug label.