diff --git a/plotLaTeX/line_plot.py b/plotLaTeX/line_plot.py
index daeb0b1..f904cac 100644
--- a/plotLaTeX/line_plot.py
+++ b/plotLaTeX/line_plot.py
@@ -34,7 +34,7 @@ def add_yvals(self, y_vals, y_name):
         self.data_info()
 
     def export(self, path="", f_name="line_results.csv"):
-        if self.x_vals == None:
+        if self.x_vals is None or len(self.x_vals) == 0:
             self.data_stack["x"] = np.arange(self.n_y_vals)
         self.f_name = f_name
         print("**Export**\n")
diff --git a/plotLaTeX/stem_plot.py b/plotLaTeX/stem_plot.py
index c38173c..10ae9fd 100644
--- a/plotLaTeX/stem_plot.py
+++ b/plotLaTeX/stem_plot.py
@@ -56,7 +56,7 @@ def LaTeXcode(self, imports=False, caption="Stem plot caption."):
             print(f"            ymax={np.max(self.y_vals)+1.0},")
             print(f"            xmin={np.min(self.x_vals)-0.5},")
             print(f"            xmax={np.max(self.x_vals)+0.5},")
-            y_ticks = np.arange(np.min(self.y_vals), np.max(self.y_vals))
+            y_ticks = np.arange(np.min(self.y_vals), np.max(self.y_vals) + 1)
             print(r"            xtick={" + ",".join(map(str, self.x_vals)) + "},")
             print(r"            ytick={" + ",".join(map(str, y_ticks)) + "},")