title: How to use ng-if with radio buttons?
body: <p>This should be a simple question.</p>
  
  <p>I'm having trouble using <code>ng-if</code> with radio buttons. These are my buttons:</p>
  
  <pre><code>&lt;label class="radio-inline"&gt;
      &lt;input type="radio" id="day_month" ng-model="day_month" name="inlineRadioOptions" value="option1"&gt; day of the
      month
  &lt;/label&gt;
  &lt;label class="radio-inline"&gt;
      &lt;input type="radio" id="day_week" ng-model="day_month" name="inlineRadioOptions" value="option2"&gt; day of the
      week
  &lt;/label&gt;
  </code></pre>
  
  <p>How can I use <code>ng-if</code> to show something if the first radio button is selected?</p>