1
我想用tensorflow.cholesky_solve來解決一個線性方程組,我得到了一些意想不到的結果。可能tensorflow cholesky_solve不一致?
我寫了一個腳本來比較非常簡單的線性系統的輸出與簡單矩陣求逆器,非基於cholesky的矩陣方程求解器tensorflow.matrix_solve和tensorflow.cholesky_solve
。
根據我對我所鏈接的文檔的理解,這三種情況都應該產生單位矩陣除以2的解,但tensorflow.cholesky_solve
並不是這種情況。也許我誤解了文檔?
import tensorflow as tf
I = tf.eye(2, dtype=tf.float32)
X = 2 * tf.eye(2, dtype=tf.float32)
X_inv = tf.matrix_inverse(X)
X_solve = tf.matrix_solve(X, I)
X_chol_solve = tf.cholesky_solve(tf.cholesky(X), I)
with tf.Session() as sess:
for x in [X_inv, X_solve, X_chol_solve]:
print('{}:\n{}'.format(x.name, sess.run(x)))
print
產生輸出:
MatrixInverse:0:
[[ 0.5 0. ]
[ 0. 0.5]]
MatrixSolve:0:
[[ 0.5 0. ]
[ 0. 0.5]]
cholesky_solve/MatrixTriangularSolve_1:0:
[[ 1. 0.]
[ 0. 1.]]
Process finished with exit code 0
我回答了你的問題嗎? – MaxB