Add convert() methods for Matrix from Vector and RowVector

Author: staticfloat

base/array.jl

@@ -320,6 +320,7 @@ oneunit(x::AbstractMatrix{T}) where {T} = _one(oneunit(T), x)
 
 convert(::Type{Vector}, x::AbstractVector{T}) where {T} = convert(Vector{T}, x)
 convert(::Type{Matrix}, x::AbstractMatrix{T}) where {T} = convert(Matrix{T}, x)
+convert(::Type{Matrix}, x::Vector) = Matrix(reshape(x, :, 1))
 
 convert(::Type{Array{T}}, x::Array{T,n}) where {T,n} = x
 convert(::Type{Array{T,n}}, x::Array{T,n}) where {T,n} = x

base/linalg/rowvector.jl

@@ -44,6 +44,9 @@ const ConjRowVector{T,CV<:ConjVector} = RowVector{T,CV}
     RowVector{T}(Vector{transpose_type(T)}(n[2])) :
     error("RowVector expects 1×N size, got $n")
 
+# Convenience constructor to Matrix
+convert(::Type{Matrix}, x::RowVector) = Matrix(reshape(x, 1, :))
+
 # Conversion of underlying storage
 convert(::Type{RowVector{T,V}}, rowvec::RowVector) where {T,V<:AbstractVector} =
     RowVector{T,V}(convert(V,rowvec.vec))