From 4f0f25dd2bebaa70aa9180df663a677850a0ad46 Mon Sep 17 00:00:00 2001
From: chrisbrahms <c.brahms@hw.ac.uk>
Date: Wed, 2 Aug 2023 08:36:10 +0100
Subject: [PATCH] restrict Capillary.gradient to vectors to avoid confusions

---
 src/Capillary.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Capillary.jl b/src/Capillary.jl
index 58563f90..741d0e6f 100644
--- a/src/Capillary.jl
+++ b/src/Capillary.jl
@@ -313,7 +313,7 @@ end
 Convenience function to create density and core index profiles for
 multi-point gradient fills defined by positions `Z` and pressures `P`.
 """
-function gradient(gas, Z, P)
+function gradient(gas, Z::AbstractVector, P::AbstractVector)
     γ = sellmeier_gas(gas)
     ex = extrema(P)
     dspl = densityspline(gas, Pmin=ex[1]==ex[2] ? 0 : ex[1], Pmax=ex[2])