shiki | A beautiful Syntax Highlighter | Code Inspection library
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kandi X-RAY | shiki Summary
Shiki is a beautiful Syntax Highlighter. Demo.
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QUESTION
I'm trying to build an LSTM model according to that picture. I'm a beginner in deep learning particulary WITH RNN structure, so i require your advice to lead me
so, for that i'm dealing with a dataframe of 70k users and 12k animes, my dataframe contains :
user id
user rating
anime id
genre : a list of tags associated with anime like : action, comedy, school ...etc.
users_tags : a list of 15 unique tags for unique user that i built thanks to tfifd method and some text data related to users
My dataframe looks like :
...ANSWER
Answered 2018-Aug-18 at 10:56You want to build a Stacked LSTM network with multiple features ( what you name parameters is often called features ), this is described in https://machinelearningmastery.com/stacked-long-short-term-memory-networks/ and https://machinelearningmastery.com/use-features-lstm-networks-time-series-forecasting/ and https://datascience.stackexchange.com/questions/17024/rnns-with-multiple-features
RNNs and so LSTMs are only able to handle sequential data, however this can be expanded by a feature vector with more than one dimensions ( your ensemble of parameters as described in the answer in https://datascience.stackexchange.com/questions/17024/rnns-with-multiple-features )
The displayed structure of the 6 LSTM cells in 2 layers is a Stacked LSTM network with 2 layers feature_dim = data_dim=6 (or 7)
( number of your parameters / features ) and timesteps=3
( 2 layers with 3 unit in each layer ) cf section Stacked LSTM for sequence classification in https://keras.io/getting-started/sequential-model-guide/ and How to stack multiple lstm in keras? for keras code.
Setting the accurate input shape is vital cf Understanding Keras LSTMs, your network is many-to-many case.
The shape of the input passed to the LSTM should be in the form (num_samples,timesteps,data_dim)
where data_dim
is the feature vector or vector of your parameters
Embedding Layers are for One-Hot encoding cf https://towardsdatascience.com/deep-learning-4-embedding-layers-f9a02d55ac12 for keras code see https://towardsdatascience.com/deep-learning-4-embedding-layers-f9a02d55ac12 and https://keras.io/layers/embeddings/ , possibly you could also use simple label encoding ( http://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.LabelEncoder.html , http://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.OneHotEncoder.html#sklearn.preprocessing.OneHotEncoder )
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