feat: добавлен дисперсионный анализ (#46)

Closes #30

statapp/models/ro_table_model.py

@@ -0,0 +1,53 @@
+import PySide2
+import numpy as np
+from PySide2 import QtCore
+from PySide2.QtCore import Qt
+
+from statapp.utils import safe_list_get
+
+
+class ROTableModel(QtCore.QAbstractTableModel):
+    def __init__(self,
+                 data=np.array([[]], dtype=np.float32),
+                 ):
+        super().__init__()
+        self._data = data
+        self._headers = {
+            Qt.Vertical:  self.getVerticalHeader,
+            Qt.Horizontal:  self.getHorizontalHeader,
+        }
+
+    def updateAllData(self, data):
+        self.layoutAboutToBeChanged.emit()
+        self._data = data
+        self.layoutChanged.emit()
+
+    def rowCount(self, index):
+        return self._data.shape[0]
+
+    def columnCount(self, index):
+        return self._data.shape[1]
+
+    def getVerticalHeader(self):
+        return []
+
+    def getHorizontalHeader(self):
+        return []
+
+    def headerData(self, section: int, orientation: Qt.Orientation, role: int = ...):
+        if role == Qt.DisplayRole:
+            return safe_list_get(self._headers[orientation](), section, None)
+
+        return None
+
+    def getData(self):
+        return self._data
+
+    def getY(self):
+        return self._data[:, 0]
+
+
+    def data(self, index, role):
+        if role == Qt.DisplayRole:
+            return float(self._data[index.row(), index.column()])
+        return None

statapp/models/variance_analysis_model.py

@@ -0,0 +1,14 @@
+from PySide2.QtCore import QModelIndex
+
+from statapp.models.ro_table_model import ROTableModel
+
+
+class VarianceAnalysisModel(ROTableModel):
+    def __init__(self, data):
+        super().__init__(data)
+
+    def getHorizontalHeader(self):
+        return ['Мат. ожидание', 'Среднекв. отклонение', 'Минимум', 'Максимум']
+
+    def getVerticalHeader(self):
+        return ['Y'] + [f'X{i}' for i in range(1, self.rowCount(QModelIndex()))]