From 166d5113ee1914c8dd9293a3829148cf1dfe85e6 Mon Sep 17 00:00:00 2001
From: Matt Rigby <matt.rigby@bristol.ac.uk>
Date: Fri, 19 Apr 2024 06:45:27 +0100
Subject: [PATCH] Changed behaviour so that Series/DataArray that is all NaN is
 returned, instead of raising an error

---
 openghg_calscales/functions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openghg_calscales/functions.py b/openghg_calscales/functions.py
index 200d255..970b786 100644
--- a/openghg_calscales/functions.py
+++ b/openghg_calscales/functions.py
@@ -175,7 +175,7 @@ def convert(c, species, scale_original, scale_new):
 
     # Check that c is not all NaNs
     if np.isnan(c).all():
-        raise ValueError("c is all NaNs.")
+        return c
 
     # Construct graph
     G = _scale_graph(species.lower())