class_docstr: Class that defines linalg operation on an array
  
  cholesky version, where svd is taken on original data array, if
  or when it matters
  
  plan: use cholesky factor and cholesky solve
  nothing implemented yet
code: def __init__(self, data=None, sym=None):
      super(SvdArray, self).__init__(data=data, sym=sym)
  
imports: import numpy
  from scipy import linalg
  from statsmodels.tools.decorators import cache_readonly
label_desc: Use image node_id 1 to create a new CholArray object from inherited base classes: PlainMatrixArray with example: obj = CholArray(data, sym)