1 files changed, 24 insertions, 0 deletions
diff --git a/tests/test_pandas.py b/tests/test_pandas.py
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+++ b/tests/test_pandas.py
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+"""Tests for using data in pandas.[DataFrame|Series]."""
+import os
+
+import numpy as np
+import pytest
+
+import lmfit
+
+pandas = pytest.importorskip('pandas')
+
+
+def test_pandas_guess_from_peak():
+    """Regression test for failure in guess_from_peak with pandas (GH #629)."""
+    data = pandas.read_csv(os.path.join(os.path.dirname(__file__), '..',
+                                        'examples', 'peak.csv'))
+    xdat, ydat = np.loadtxt(os.path.join(os.path.dirname(__file__), '..',
+                                         'examples', 'peak.csv'),
+                            unpack=True, skiprows=1, delimiter=',')
+
+    model = lmfit.models.LorentzianModel()
+    guess_pd = model.guess(data['y'], x=data['x'])
+    guess = model.guess(ydat, x=xdat)
+
+    assert guess_pd == guess