diff --git a/dot2tex/utils.py b/dot2tex/utils.py
index f4f5e2e..c406fdc 100644
--- a/dot2tex/utils.py
+++ b/dot2tex/utils.py
@@ -83,6 +83,8 @@ def getboolattr(item, key, default):
 
 
 def smart_float(number):
+    if isinstance(number, str):
+        number = number.replace("\\", "").replace("\r", "").replace("\n", "");
     number_as_string = "%s" % float(number)
     if 'e' in number_as_string:
         return "%.4f" % float(number)
@@ -122,4 +124,4 @@ def get_all_graph_elements(graph, l=None):
     if outer:
         return l
     else:
-        l.append(EndOfGraphElement())
\ No newline at end of file
+        l.append(EndOfGraphElement())