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-rw-r--r--hawkes/data.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/hawkes/data.py b/hawkes/data.py
index e5c33f8..5f68dd1 100644
--- a/hawkes/data.py
+++ b/hawkes/data.py
@@ -14,7 +14,7 @@ def parse(s):
def fluctuation_int(t):
if t is None:
t = MAX_TIME
- return t + 0.43 / 0.0172 * (cos(4.36) - cos(0.0172 * t + 4.36))
+ return (t, t + 0.43 / 0.0172 * (cos(4.36) - cos(0.0172 * t + 4.36)))
def load_nodes(filename):