javascript - ChartJS unique datasets per label

Question

I'm sitting here on a problem and I can't find a solution for it. I'm trying to create a stacked bar graph with chartJS. Nothing complicated to that point.

My problem: Every bar on my chart should have unique values / labels. Those shouldn't be repeated on the next bar... Kinda complicated to explain, thats why I draw a picture:

As you see, every bar should have its unique data. Normally, if you have "Apples" on the first bar with some value, "apples" will also apear on the second bar with some other values... But I don't want that. I really want separated bars, not related to each other in one graph.

Is there a way to achieve this?

I'm trying since like 48 hours and really tried everything. tried with multidimensional arrays, "stacked" options, multiple datasets but nothing seems to work. Is it even possible to achieve this with chartJS?

I'll post my current code (be aware that this is just one version of like 50 different things I tried... but I thought it may be good to post the simple code I have at the moment, since the other fails won't really help anything...)

Here's the code I'm currently trying to modify:

var ctx = document.getElementById("chart1").getContext('2d');
var labels = ["Data1", "Data2", "Data3"];
var data = {
    "labels": labels,
    "datasets": [{
        "label": "t1",
        "xAxisID": "x-axis-0",
        "data": [29, 19, 26],
        "backgroundColor": 'blue'
    },
    {
        "label": "t1_SUM",
        "xAxisID": "x-axis-0",
        "data": [32, 29, 36],
        "backgroundColor": 'red'
    }]
}

new Chart(ctx, {
    type: "bar",
    data: data,
    options: {
        scales: {
            xAxes: [{
                "stacked": true,
                "id": "x-axis-0"
            },
            {
                "stacked": true,
                "id": "x-axis-1",
            }]
        }
    }
});

Really appreciate any help!

Thanks.

Answer 1

资料来源：https ://www.chartjs.org/samples/latest/charts/bar/stacked.html

您可以将每一列定义为 1 个或多个数据集。前任：

datasets: [{
                label: 'Dataset 1',
                backgroundColor: window.chartColors.red,
                data: [
                    randomScalingFactor(),
                    null,
                    null,
                    null,
                    null,
                    null,
                    null
                ]
            }, {
                label: 'Dataset 2',
                backgroundColor: window.chartColors.blue,
                data: [
                    null,
                    randomScalingFactor(),
                    null,
                    null,
                    null,
                    null,
                    null
                ]
            }]

var barChartData = {
			labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
			datasets: [{
				label: 'Dataset 1',
				backgroundColor: window.chartColors.red,
				data: [
					randomScalingFactor(),
					null,
					null,
					null,
					null,
					null,
					null
				]
			}, {
				label: 'Dataset 2',
				backgroundColor: window.chartColors.blue,
				data: [
					randomScalingFactor(),
					null,
					null,
					null,
					null,
					null,
					null
				]
			}, {
				label: 'Dataset 3',
				backgroundColor: window.chartColors.green,
				data: [
					null,
					randomScalingFactor(),
					null,
					null,
					null,
					null,
					null
				]
			}, {
				label: 'Dataset 4',
				backgroundColor: window.chartColors.green,
				data: [
					null,
					null,
					randomScalingFactor(),
					null,
					null,
					null,
					null
				]
			}]

		};
			var ctx = document.getElementById('canvas').getContext('2d');
			window.myBar = new Chart(ctx, {
				type: 'bar',
				data: barChartData,
				options: {
					title: {
						display: true,
						text: 'Chart.js Bar Chart - Stacked'
					},
					tooltips: {
						callbacks: {
                label: function(tooltipItem, data) {
                    var label = data.datasets[tooltipItem.datasetIndex].label || '';

                    if (label) {
                        label += ': ';
                    }
                    label += Math.round(tooltipItem.yLabel * 100) / 100;
                    return label;
                }
            }
					},
					responsive: true,
					scales: {
						xAxes: [{
							stacked: true,
						}],
						yAxes: [{
							stacked: true
						}]
					}
				}
			});

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