Add a corner case checking for ∆∆

Author: Jacobluke-

dabest/_classes.py

@@ -151,7 +151,8 @@ def __init__(self, data, idx, x, y, paired, id_col, ci,
         if idx is None and x is not None and y is not None:
             # Add a length check for unique values in the first element in list x, 
             # if the length is greater than 2, force delta2 to be False
-            if len(data_in[x[0]].unique()) > 2:
+            # Should be removed if delta2 for situations other than 2x2 is supported
+            if len(data_in[x[0]].unique()) > 2 and x1_level is None:
                 delta2 = False
                 self.__delta2 = delta2
                 # stop the loop if delta2 is False

nbs/API/class.ipynb

@@ -221,7 +221,8 @@
     "        if idx is None and x is not None and y is not None:\n",
     "            # Add a length check for unique values in the first element in list x, \n",
     "            # if the length is greater than 2, force delta2 to be False\n",
-    "            if len(data_in[x[0]].unique()) > 2:\n",
+    "            # Should be removed if delta2 for situations other than 2x2 is supported\n",
+    "            if len(data_in[x[0]].unique()) > 2 and x1_level is None:\n",
     "                delta2 = False\n",
     "                self.__delta2 = delta2\n",
     "                # stop the loop if delta2 is False\n",