diff --git a/NanoVNASaver/Analysis.py b/NanoVNASaver/Analysis.py
index 507aa43..98c0cde 100644
--- a/NanoVNASaver/Analysis.py
+++ b/NanoVNASaver/Analysis.py
@@ -75,12 +75,15 @@ class LowPassAnalysis(Analysis):
         self.reset()
         pass_band_location = self.app.markers[0].location
         logger.debug("Pass band location: %d", pass_band_location)
-        if pass_band_location < 0:
-            logger.debug("No location for %s", self.app.markers[0].name)
-            return
 
         if len(self.app.data21) == 0:
             logger.debug("No data to analyse")
+            self.result_label.setText("No data to analyse.")
+            return
+
+        if pass_band_location < 0:
+            logger.debug("No location for %s", self.app.markers[0].name)
+            self.result_label.setText("Please place " + self.app.markers[0].name  + " in the passband.")
             return
 
         pass_band_db = NanoVNASaver.gain(self.app.data21[pass_band_location])
@@ -214,12 +217,15 @@ class HighPassAnalysis(Analysis):
         self.reset()
         pass_band_location = self.app.markers[0].location
         logger.debug("Pass band location: %d", pass_band_location)
-        if pass_band_location < 0:
-            logger.debug("No location for %s", self.app.markers[0].name)
-            return
 
         if len(self.app.data21) == 0:
             logger.debug("No data to analyse")
+            self.result_label.setText("No data to analyse.")
+            return
+
+        if pass_band_location < 0:
+            logger.debug("No location for %s", self.app.markers[0].name)
+            self.result_label.setText("Please place " + self.app.markers[0].name  + " in the passband.")
             return
 
         pass_band_db = NanoVNASaver.gain(self.app.data21[pass_band_location])
@@ -347,9 +353,9 @@ class BandPassAnalysis(Analysis):
         self.span_label = QtWidgets.QLabel()
         self.quality_label = QtWidgets.QLabel()
 
-        layout.addRow("Center frequency", self.center_frequency_label)
-        layout.addRow("Span", self.span_label)
-        layout.addRow("Quality factor", self.quality_label)
+        layout.addRow("Center frequency:", self.center_frequency_label)
+        layout.addRow("Span:", self.span_label)
+        layout.addRow("Quality factor:", self.quality_label)
 
         layout.addRow(QtWidgets.QLabel(""))
 
@@ -388,12 +394,15 @@ class BandPassAnalysis(Analysis):
         self.reset()
         pass_band_location = self.app.markers[0].location
         logger.debug("Pass band location: %d", pass_band_location)
-        if pass_band_location < 0:
-            logger.debug("No location for %s", self.app.markers[0].name)
-            return
 
         if len(self.app.data21) == 0:
             logger.debug("No data to analyse")
+            self.result_label.setText("No data to analyse.")
+            return
+
+        if pass_band_location < 0:
+            logger.debug("No location for %s", self.app.markers[0].name)
+            self.result_label.setText("Please place " + self.app.markers[0].name  + " in the passband.")
             return
 
         pass_band_db = NanoVNASaver.gain(self.app.data21[pass_band_location])
diff --git a/NanoVNASaver/NanoVNASaver.py b/NanoVNASaver/NanoVNASaver.py
index d2cfa7e..6c119fe 100644
--- a/NanoVNASaver/NanoVNASaver.py
+++ b/NanoVNASaver/NanoVNASaver.py
@@ -1848,9 +1848,9 @@ class AnalysisWindow(QtWidgets.QWidget):
         self.setWindowTitle("Sweep analysis")
         self.setWindowIcon(self.app.icon)
 
-        self.setMinimumSize(400, 600)
+        #self.setMinimumSize(400, 600)
 
-        self.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.MinimumExpanding)
+        #self.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.MinimumExpanding)
 
         shortcut = QtWidgets.QShortcut(QtCore.Qt.Key_Escape, self, self.hide)
 
@@ -1875,20 +1875,23 @@ class AnalysisWindow(QtWidgets.QWidget):
 
         self.analysis_layout = QtWidgets.QVBoxLayout(analysis_box)
 
-        self.analysis = self.analysis_list.currentData()
-        self.analysis_layout.addWidget(self.analysis.widget())
-
         layout.addWidget(select_analysis_box)
         layout.addWidget(analysis_box)
 
+        self.updateSelection()
+
     def runAnalysis(self):
         if self.analysis is not None:
             self.analysis.runAnalysis()
 
     def updateSelection(self):
         self.analysis = self.analysis_list.currentData()
-        old_widget = self.analysis_layout.itemAt(0).widget()
-        self.analysis_layout.replaceWidget(old_widget, self.analysis.widget())
-        old_widget.hide()
+        old_item = self.analysis_layout.itemAt(0)
+        if old_item is not None:
+            old_widget = self.analysis_layout.itemAt(0).widget()
+            self.analysis_layout.replaceWidget(old_widget, self.analysis.widget())
+            old_widget.hide()
+        else:
+            self.analysis_layout.addWidget(self.analysis.widget())
         self.analysis.widget().show()
         self.update()