April 2020
Intermediate to advanced
344 pages
8h 22m
Japanese
Content preview from Pythonではじめる教師なし学習 ―機械学習の可能性を広げるラベルなしデータの利用
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
10.5
RBM
を用いた協調フィルタリング
233
prv_hb = cur_hb
prv_vb = cur_vb
error = sess.run(err, feed_dict={v0: X,
_w: cur_w, _vb: cur_vb, _hb: cur_hb})
print ('Epoch: %d' % epoch,'reconstruction error: %f' % error)
self.w = prv_w
self.hb = prv_hb
self.vb = prv_vb
10.5.3
RBM
を用いた推薦システムの訓練
RBM
を訓練するために、まず
ratings_train
から
inputX
を作り、それを
float32
に変換する。
次に
RBM
を定義する。この際に、入力と出力を
1,000
次 元 、学 習 率 を
0.3
、訓 練 エ ポ ッ ク 数 を
500
、バッ
チサイズを
200
とする。これえらのパラメータ値は最初の予備評価のためのパラメータにすぎない。い
ろいろ試してもっといいパラメータを探してみてほしい。
# Begin the training cycle
# Convert inputX into float32
inputX = ratings_train
inputX = inputX.astype(np.float32)
# Define the parameters of the RBMs we will train
rbm=RBM(1000,1000,0.3,500,200) ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.