have user defined istart

Author: kain88-de

package/MDAnalysis/coordinates/DCD.py

@@ -358,6 +358,7 @@ def __init__(self,
                  dt=1,
                  remarks='',
                  nsavc=1,
+                 istart=1,
                  **kwargs):
         """Parameters
         ----------
@@ -380,6 +381,8 @@ def __init__(self,
             how many MD steps is a frame saved to the DCD). By default, this
             number is just set to one and this should be sufficient for almost
             all cases but if required, nsavc can be changed.
+        istart : int (optional)
+            starting frame number. CHARMM defaults to 1.
         **kwargs : dict
             General writer arguments
 
@@ -400,7 +403,7 @@ def __init__(self,
             nsavc=nsavc,
             delta=delta,
             is_periodic=1,
-            istart=0)
+            istart=istart)
 
     def write_next_timestep(self, ts):
         """Write timestep object into trajectory.