I have some simple code to make a left-quaternion multiplication matrix: function L_q(q::Vector{T}) where {T<:Real} return [q[1] -q[2:4]'; q[2:4] q[1] * I + SkewSymmetricMatrix(q[2:4])] end But the problem is that the hvcat operation makes the return type unstable. Here’s the output from runni…

Type instability in array concatenation

Tamas_Papp January 4, 2020, 8:18am 2

Please provide an MWE.

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