B
    `                 @   sd   d Z ddlZddlmZmZ ddlmZ ddlm	Z	 ddl
mZmZ ddlmZ G dd	 d	eZdS )
zTests for _sketches.py.    N)assert_assert_equal)clarkson_woodruff_transform)
cwt_matrix)issparserand)normc            
   @   s   e Zd ZdZejjddZdZdZ	dZ
dZdd	d
dddddddg
Zeee	Zeee	e
dedZeee	e
dedZeee	e
dedZeeeegZeedee Zdd Zdd Zdd Zdd Zdd  Zd!S )"TestClarksonWoodruffTransformz1
    Testing the Clarkson Woodruff Transform
    iGF)seedi  d   g?   iڦhiv7iSRir6xhi'@wiڷMiZiTzYi CiUf[Zcsc)densityformatZrandom_stateZcsrZcoo   c             C   sJ   xD| j D ]:}x4| jD ]*}t|| j|d}t|j| j| jfk qW qW d S )N)r
   )test_matricesseedsr   n_sketch_rowsr   shapen_cols)selfAr
   sketch r   O/home/dcms/DCMS/lib/python3.7/site-packages/scipy/linalg/tests/test_sketches.pytest_sketch_dimensions1   s
    z4TestClarksonWoodruffTransform.test_sketch_dimensionsc             C   sZ   xT| j D ]J}xD| jD ]:}t| j| j|d }t| j| j|d }t|| qW qW d S )N)r
   )r   r   r   r   n_rowstodenser   )r   r   r
   ZS1ZS2r   r   r   ,test_seed_returns_identical_transform_matrix9   s    zJTestClarksonWoodruffTransform.test_seed_returns_identical_transform_matrixc             C   sn   xh| j D ]^}xX| jD ]N}t|| j|d}t|| j|d}t|rH| }t|rX| }t|| qW qW d S )N)r
   )r   r   r   r   r   r   r   )r   r   r
   Zsketch1Zsketch2r   r   r   test_seed_returns_identicallyD   s    z;TestClarksonWoodruffTransform.test_seed_returns_identicallyc             C   s   d}x| j D ]~}t|r"t|}ntj|}xZ| jD ]P}t|| j|d}t|r\t|}ntj|}t|| d| kr6|d7 }q6W qW t	|dk d S )Nr   )r
   g?r   )
r   r   r   nplinalgr   r   r   absr   )r   n_errorsr   	true_normr
   r   sketch_normr   r   r   $test_sketch_preserves_frobenius_normS   s    

zBTestClarksonWoodruffTransform.test_sketch_preserves_frobenius_normc             C   sz   d}t td}tj| j}xH| jD ]>}t| j||d}tj|}t|| d| kr(|d7 }q(W t	|dk d S )Nr   g      @)r
   g      ?r   )
intr   ceilr    r   xr   r   r!   r   )r   r"   r   r#   r
   r   r$   r   r   r   !test_sketch_preserves_vector_normj   s    z?TestClarksonWoodruffTransform.test_sketch_preserves_vector_normN)__name__
__module____qualname____doc__r   randomZRandomStaterngr   r   r   r   r   ZrandnZA_denser   ZA_cscZA_csrZA_coor   sqrtr(   r   r   r   r%   r)   r   r   r   r   r	      s,   
r	   )r-   numpyr   Znumpy.testingr   r   Zscipy.linalgr   Zscipy.linalg._sketchesr   Zscipy.sparser   r   Zscipy.sparse.linalgr   objectr	   r   r   r   r   <module>   s   