Clip change a to b

documentation/source/clip.rst

@@ -14,7 +14,7 @@ returns *out_a* if *in_a* > *in_b*, *out_b* otherwise. It's usually implemented
     val_1 = 1
     val_2 = 2
     pyear = 2002
-    val.k = clip(val_2, val_1, time.k, pyear)
+    val.k = clip(val_1, val_2, pyear, time.k)
 
 the variable *val* will change from *val_1* to *val_2* at time *pyear*.