fix

rfg_adc_plotter/state/ring_buffer.py

@@ -201,6 +201,21 @@ class RingBuffer:
         base = self.ring if self.head == 0 else np.roll(self.ring, -self.head, axis=0)
         return base.T
 
+    def get_display_raw_decimated(self, max_points: int) -> np.ndarray:
+        """Return a display-oriented raw waterfall with optional frequency decimation."""
+        if self.ring is None:
+            return np.zeros((1, 1), dtype=np.float32)
+
+        limit = int(max_points)
+        if limit <= 0 or self.width <= limit:
+            return self.get_display_raw()
+
+        row_order = np.arange(self.ring.shape[0], dtype=np.int64)
+        if self.head:
+            row_order = np.roll(row_order, -self.head)
+        col_idx = np.linspace(0, self.width - 1, limit, dtype=np.int64)
+        return self.ring[np.ix_(row_order, col_idx)].T
+
     def get_display_fft_linear(self) -> np.ndarray:
         if self.ring_fft is None:
             return np.zeros((1, 1), dtype=np.float32)