class_docstr: Multivariate Normal Proposal Distribution.
class_docstr_tok: ["Multivariate","Normal","Proposal","Distribution","."]
code: def __call__(self, num_draws=None):
      if num_draws is not None:
          b = np.random.randn(self.n, num_draws)
          return np.dot(self.chol, b).T
      else:
          b = np.random.randn(self.n)
          return np.dot(self.chol, b)
  
imports: from __future__ import division
  import scipy.linalg
  import numpy
  import numpy.random
label_desc: Use image node_id 2 for calling the MultivariateNormalProposal obj's underlying member method code with example usage: obj.__call__(num_draws) and returns: np, np