Generate Vertically-ordered HTML Table

new.html.erb

<% @rows_per_column = 18 %>
<% @columns = 7 %>

<table class="table">
	<tbody>
	<tr>
		<th>Sunday</th>
		<th>Monday</th>
		<th>Tuesday</th>
		<th>Wednesday</th>
		<th>Thursday</th>
		<th>Friday</th>
		<th>Saturday</th>
	</tr>
	<% 0.upto(@rows_per_column).each do |row| %>
	<tr>
		<%= f.fields_for :schedules do |builder| %>		
	        	<% 0.upto(@columns - 1).each do |column| %>
	        		<% index = row + (column * @rows_per_column) %>
	        		<td><%= index %>			

				<div class="field">
					<%= builder.label :day %>
				</div>	
				</td>
			<% end %>
	 	<% end %>

	      </tr>
		<% end %>

	</tbody>
</table>