just use this:
<script>
var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["1","2","3","4","5","6","7","8","9","10","11",],
datasets: [{
label: 'YOUR LABEL',
backgroundColor: [
"#566573",
"#99a3a4",
"#dc7633",
"#f5b041",
"#f7dc6f",
"#82e0aa",
"#73c6b6",
"#5dade2",
"#a569bd",
"#ec7063",
"#a5754a"
],
data: [12, 19, 3, 17, 28, 24, 7, 2,4,14,6],
},]
},
//HERE COMES THE AXIS Y LABEL
options : {
scales: {
yAxes: [{
scaleLabel: {
display: true,
labelString: 'probability'
}
}]
}
}
});
</script>