title: add two tensor with shape one dimension in tensorflow
body: <p>hallo i am new in tensorflow, i am trying to add two tensor with shape one dimension and actually when i printed out there is nothing added so for example:</p>
  
  <pre><code>num_classes = 11
  
  v1 = tf.Variable(tf.constant(1.0, shape=[num_classes]))
  v2 = tf.Variable(tf.constant(1.0, shape=[1]))
  
  result = tf.add(v1 ,  v2)
  </code></pre>
  
  <p>and that's the output when i printed out </p>
  
  <pre><code>result Tensor("Add:0", shape=(11,), dtype=float32)
  </code></pre>
  
  <p>So the result is still 11 instead of 12. Is my way wrong or there is another way to add them.</p>