 columns y x</code></font>'.  If there were an initial
column of extraneous data, the command would be 
`<font color="#82140F"><code>read columns * x y</code></font>', or `<font color="#82140F"><code>read columns x=2 y=3</code></font>'
(see <a href="Read.html#ReadColumns">Read Columns</a>).
<li>
`<font color="#82140F"><code>draw curve</code></font>' tells Gri to draw a curve connecting the points
in the `<font color="#82140F"><code>x</code></font>' and `<font color="#82140F"><code>y</code></font>' columns. 