title: How can I change the shape of a variable in TensorFlow?
body: <p><a href="http://www.tensorflow.org/how_tos/variables/index.md#creation">TensorFlow tutorial</a> says that at creation time we need to specify the shape of tensors.  That shape automatically becomes the shape of the tensor.  It also says that TensorFlow provides advanced mechanisms to reshape variables. How can I do that? Any code example?</p>