CDF format, see
<p>
`<font color="#82140F"><code>http://www.unidata.ucar.edu/packages/netcdf/index.html</code></font>'
<a href="http://www.unidata.ucar.edu/packages/netcdf/index.html"> 
here </a>. 
<p>
<li> `<font color="#82140F"><code>read columns * y z * x</code></font>'
Read `<font color="#82140F"><code>x</code></font>' in column 5, `<font color="#82140F"><code>y</code></font>' in column 2, and `<font color="#82140F"><code>z</code></font>' in column
3.  The `<font color="#82140F"><code>z</code></font>' c