I think it will be easier to give an example. There is such a schedule:
Every day of the week there is a "bar". I need to do this: 
That in one day of the week was 2, 3, etc. bar'ov.
Is it possible?
When you add a second dataset'a exactly as described above and will happen.
var barData = { labels: ['Italy', 'UK', 'USA', 'Germany', 'France', 'Japan'], datasets: [ { label: '2010 customers #', fillColor: '#382765', data: [2500, 1902, 1041, 610, 1245, 952] }, { label: '2014 customers #', fillColor: '#7BC225', data: [3104, 1689, 1318, 589, 1199, 1436] } ] }; var context = document.getElementById('clients').getContext('2d'); var clientsChart = new Chart(context).Bar(barData); Source: https://ru.stackoverflow.com/questions/567495/
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