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
docstr: xSigmainvx
  does not use stored cholesky yet
docstr_tok: ["xSigmainvx","does","not","use","stored","cholesky","yet"]
code: def yt_minv_y(self, y):
      """xSigmainvx
      does not use stored cholesky yet
      """
      return np.dot(x, linalg.cho_solve(linalg.cho_factor(self.m), x))
  
imports: import numpy
  from scipy import linalg
  from statsmodels.tools.decorators import cache_readonly
label_desc: Use image node_id 2 for calling the CholArray obj's underlying member method code with example usage: obj.yt_minv_y(y) and returns: np