fixed index starting at 0 in qqplot

jass/models/plots.py

@@ -263,7 +263,7 @@ def create_qq_plot(work_file_path: str, qq_plot_path: str):
         "Univariate q-value" : qvalue_univ.sort_values().values,
         })
     QQ_pval = QQ_pval.iloc[::20,].dropna()
-    exp_val = np.flip(- np.log10(QQ_pval.index.values /  QQ_pval.index.max()))
+    exp_val = np.flip(- np.log10((QQ_pval.index.values+1) /  (QQ_pval.index.max()+1)))
 
     exp_val[-1] = QQ_pval.max().max()
     QQ_pval.index = exp_val

jass/test/__init__.py

@@ -24,7 +24,6 @@ class JassTestCase(unittest.TestCase):
             os.path.dirname(os.path.abspath(__file__)), cls.test_folder, test_file_name
         )
 
-
 class JassWebClientTestCase(JassTestCase):
     def setUp(self) -> None:
         from jass.config import config