How to create stack bar chart using ggplot : <p>I have a data-set as below:</p>

<pre><code>A   B   C
1   1   1
0   1   1
1   0   1
1   0   1
</code></pre>

<p>I want to have a stack bar chart that shows percentage of 1 and 0 in each column next to other column all in one figure.</p>
