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-rw-r--r--gn3/api/correlation.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/gn3/api/correlation.py b/gn3/api/correlation.py
index c0b5806..1caf31f 100644
--- a/gn3/api/correlation.py
+++ b/gn3/api/correlation.py
@@ -110,7 +110,7 @@ def partial_correlation():
tuple(trait_fullname(trait) for trait in args["control_traits"]),
args["method"], int(args["criteria"]), args["target_db"])
response = make_response(
- json.dumps(corr_results, cls=OutputEncoder),
+ json.dumps(corr_results, cls=OutputEncoder).replace(": NaN", ": null"),
400 if "error" in corr_results.keys() else 200)
response.headers["Content-Type"] = "application/json"
return response