[,18] [,19] [,20] [,21] [,22] [,23] [,24] [,25]</span></span>
<span><span class="co">## [1,]     1     1     1     1     1     1     1     1     1     1     1</span></span>
<span><span class="co">## [2,]     1     1     1     1     1     1     1     1     1     1     0</span></span></code></pre>
<p>Now that we have expanded the dataset to have a 25th column, filled
with 0s except for the first column, it only remains to show how to
delete a dataset. However note: Deleting a dataset does not lead to a
reduct