Nmap wont scan with -oN or -oG
<p>I'm trying to use nmap for port scanning some instances and I would like to have it give me some better looking output.  I would like to use the <code>-oG</code> or <code>-oN</code> options, however neither seem to work and using gives me the following output:</p>

<pre><code>user@hostname:~$ nmap -oG 1.2.3.4

Starting Nmap 7.30 ( https://nmap.org ) at 2016-10-14 10:36 PDT
WARNING: No targets were specified, so 0 hosts scanned.
Nmap done: 0 IP addresses (0 hosts up) scanned in 0.03 seconds


user@hostname:~$ nmap -oN 1.2.3.4

Starting Nmap 7.30 ( https://nmap.org ) at 2016-10-14 10:36 PDT
WARNING: No targets were specified, so 0 hosts scanned.
Nmap done: 0 IP addresses (0 hosts up) scanned in 0.04 seconds
</code></pre>

<p>How do I get it to scan my instance with this option?</p>