diff --git a/seispy/rfcorrect.py b/seispy/rfcorrect.py
index fdf80de..67bd562 100644
--- a/seispy/rfcorrect.py
+++ b/seispy/rfcorrect.py
@@ -470,23 +470,19 @@ def harmonic(self, tb=-5, te=10, is_stack=True):
         self.harmo.harmo_trans()
         return self.harmo.harmonic_trans, self.harmo.unmodel_trans
 
-    def plotrt(self, outformat=None, **kwargs):
+    def plotrt(self, **kwargs):
         """Plot radial and transverse RFs
-
-        :param outformat: Output format for plot, defaults to None
-        :type outformat: str, optional
+        :param kwargs: Parameters for plot, see :meth:`seispy.plotRT.plotrt` for detail
         """
         if self.only_r:
             raise ValueError('Transverse RFs are nessary or use RFStation.plotr instead.')
-        return _plotrt(self, outformat=outformat, **kwargs)
+        return _plotrt(self, **kwargs)
 
-    def plotr(self, outformat=None, **kwargs):
+    def plotr(self,**kwargs):
         """Plot radial RFs
-
-        :param outformat: Output format for plot, defaults to None
-        :type outformat: str, optional
+        :param kwargs: Parameters for plot, see :meth:`seispy.plotR.plotr` for detail
         """
-        return _plotr(self, outformat=outformat, **kwargs)
+        return _plotr(self, **kwargs)
 
 
 class SACStation(RFStation):
diff --git a/seispy/scripts.py b/seispy/scripts.py
index 6eb38f5..274f286 100644
--- a/seispy/scripts.py
+++ b/seispy/scripts.py
@@ -247,7 +247,7 @@ def plot_rt():
     if arg.format not in ('f', 'g'):
         raise ValueError('Error: The format must be in \'f\' and \'g\'')
     rfsta = RFStation(arg.rfpath, prime_comp=arg.c)
-    rfsta.plotrt(rfsta, enf=arg.enf, out_path=arg.output, key=arg.k, outformat=arg.format, xlim=[-2, arg.x])
+    rfsta.plotrt(enf=arg.enf, out_path=arg.output, key=arg.k, outformat=arg.format, xlim=[-2, arg.x])
 
 
 def plot_r():
@@ -268,7 +268,7 @@ def plot_r():
     if arg.format not in ('f', 'g'):
         parser.error('Error: The format must be in \'f\' and \'g\'')
     rfsta = RFStation(arg.rfpath, prime_comp=arg.c)
-    rfsta.plotr(rfsta, arg.output, enf=arg.enf, key=arg.k, xlim=[-2, arg.x], outformat=arg.format)
+    rfsta.plotr(arg.output, enf=arg.enf, key=arg.k, xlim=[-2, arg.x], outformat=arg.format)
 
 
 def get_events():