more nan handling

Author: scottshambaugh

labellines/core.py

@@ -196,7 +196,7 @@ def labelLines(
 
         for i, line in enumerate(all_lines):
             xdata, _ = normalize_xydata(line)
-            minx, maxx = min(xdata), max(xdata)
+            minx, maxx = np.nanmin(xdata), np.nanmax(xdata)
             for j, xv in enumerate(xvals):  # type: ignore
                 ok_matrix[i, j] = minx < xv < maxx
 
@@ -223,7 +223,7 @@ def labelLines(
 
         # Move xlabel if it is outside valid range
         xdata, _ = normalize_xydata(line)
-        xmin, xmax = min(xdata), max(xdata)
+        xmin, xmax = np.nanmin(xdata), np.nanmax(xdata)
         if not (xmin <= xv <= xmax):
             warnings.warn(
                 (