title: principal component analysis in RNN
body: <p>If I want to project sequence(features) A,B,and C to target sequence with tensorflow LSTM, how can I know the importance of each features affected the target? Does the principal component analysis help? If pca can helps, how to do?</p>
  
  <p>The structure（columns） of data set such as below:</p>
  
  <pre><code>   A sequence
     B sequence
     C sequence
     Target sequence
  </code></pre>