title: What's the dimensionality of the output space in Tensorflow's docs?
body: <p>I've been going through the docs recently and in many different functions like <em><a href="https://www.tensorflow.org/versions/r1.0/api_docs/python/tf/layers/dense" rel="noreferrer">tf.layers.dense</a></em> or the <em><a href="https://www.tensorflow.org/versions/r1.0/api_docs/python/tf/layers/conv2d" rel="noreferrer">tf.nn.conv2d</a></em>, I came across with the arguments <em>units</em> and <em>filters</em> respectively and I can't understand the point of them. Can someone clearly describe the meaning of </p>
  
  <blockquote>
    <p>dimensionality of the output space</p>
  </blockquote>
  
  <p>in the above cases or maybe more general terms? Thanks in advance.</p>