class_docstr: Preallocation strategies for rolling window over expanding data set
  
  Restrictions: major_axis can only be a DatetimeIndex for now
class_docstr_tok: ["Preallocation","strategies","for","rolling","window","over","expanding","data","set","Restrictions",":","major_axis","can","only","be","a","DatetimeIndex","for","now"]
code: def set_minor_axis(self, minor_axis):
      self.minor_axis = _ensure_index(minor_axis)
      self.buffer = self.buffer.reindex(minor_axis=self.minor_axis)
  
imports: import datetime
  from copy import deepcopy
  import numpy
  import pandas
label_desc: Use image node_id 6 for calling the RollingPanel obj's underlying member method code with example usage: obj.set_minor_axis(minor_axis) without return types