[英]How to show value at the end of column in amcharts 4
how can I show a value at the end of the column in positive or negative plotted column.如何在正或负绘制列的列末尾显示一个值。 I have tried different solutions but it is not working for negative plotted columns
我尝试了不同的解决方案,但它不适用于负标绘列
/** * --------------------------------------- * This demo was created using amCharts 4. * * For more information visit: * https://www.amcharts.com/ * * Documentation is available at: * https://www.amcharts.com/docs/v4/ * --------------------------------------- */ // Themes begin am4core.useTheme(am4themes_animated); // Themes end // Create chart instance var chart = am4core.create("chartdiv", am4charts.XYChart); // Add data chart.data = [{ "country": "USA", "visits": 2025 }, { "country": "China", "visits": -1882 }, { "country": "Japan", "visits": 1809 }, { "country": "Germany", "visits": 1322 }, { "country": "UK", "visits": 1122 }, { "country": "France", "visits": 1114 }, { "country": "India", "visits": 984 }, { "country": "Spain", "visits": -711 }, { "country": "Netherlands", "visits": 665 }, { "country": "Russia", "visits": 580 }, { "country": "South Korea", "visits": 443 }, { "country": "Canada", "visits": 441 }, { "country": "Brazil", "visits": 395 }]; // Create axes var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis()); categoryAxis.dataFields.category = "country"; categoryAxis.renderer.grid.template.location = 0; categoryAxis.renderer.minGridDistance = 30; categoryAxis.renderer.labels.template.adapter.add("dy", function(dy, target) { if (target.dataItem && target.dataItem.index & 2 == 2) { return dy + 25; } return dy; }); var valueAxis = chart.yAxes.push(new am4charts.ValueAxis()); // Create series var series = chart.series.push(new am4charts.ColumnSeries()); series.dataFields.valueY = "visits"; series.dataFields.categoryX = "country"; series.name = "Visits"; series.columns.template.tooltipText = "{categoryX}: [bold]{valueY}[/]"; series.columns.template.fillOpacity =.8; var columnTemplate = series.columns.template; columnTemplate.strokeWidth = 2; columnTemplate.strokeOpacity = 1;
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; } #chartdiv { width: 100%; height: 500px; }
<script src="https://cdn.amcharts.com/lib/4/core.js"></script> <script src="https://cdn.amcharts.com/lib/4/charts.js"></script> <script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script> <div id="chartdiv"></div>
I need to show the value at the top of the each column, if the bar is plotted in a negative way so there should be the value at the end of the column too.我需要在每一列的顶部显示值,如果条形图以负数方式绘制,那么列末尾也应该有值。
For example:例如:
It can be done through bullets , specifically creating a new LabelBullet
:它可以通过bullets来完成,特别是创建一个新的
LabelBullet
:
var valueLabel = series.bullets.push(new am4charts.LabelBullet());
and setting the text:并设置文本:
valueLabel.label.text = "{valueY}";
Aligning the labels according to data can be done through verticalCenter
and dy
adapters.可以通过
verticalCenter
和dy
适配器根据数据对齐标签。
One can play with fontSize
and label.truncate
properties to fit the labels nicely.可以使用
fontSize
和label.truncate
属性来很好地适应标签。
/** * --------------------------------------- * This demo was created using amCharts 4. * * For more information visit: * https://www.amcharts.com/ * * Documentation is available at: * https://www.amcharts.com/docs/v4/ * --------------------------------------- */ // Themes begin am4core.useTheme(am4themes_animated); // Themes end // Create chart instance var chart = am4core.create("chartdiv", am4charts.XYChart); // Add data chart.data = [{ "country": "USA", "visits": 2025 }, { "country": "China", "visits": -1882 }, { "country": "Japan", "visits": 1809 }, { "country": "Germany", "visits": 1322 }, { "country": "UK", "visits": 1122 }, { "country": "France", "visits": 1114 }, { "country": "India", "visits": 984 }, { "country": "Spain", "visits": -711 }, { "country": "Netherlands", "visits": 665 }, { "country": "Russia", "visits": 580 }, { "country": "South Korea", "visits": 443 }, { "country": "Canada", "visits": 441 }, { "country": "Brazil", "visits": 395 }]; // Create axes var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis()); categoryAxis.dataFields.category = "country"; categoryAxis.renderer.grid.template.location = 0; categoryAxis.renderer.minGridDistance = 30; categoryAxis.renderer.labels.template.adapter.add("dy", function(dy, target) { if (target.dataItem && target.dataItem.index & 2 == 2) { return dy + 25; } return dy; }); var valueAxis = chart.yAxes.push(new am4charts.ValueAxis()); // Create series var series = chart.series.push(new am4charts.ColumnSeries()); series.dataFields.valueY = "visits"; series.dataFields.categoryX = "country"; series.name = "Visits"; series.columns.template.tooltipText = "{categoryX}: [bold]{valueY}[/]"; series.columns.template.fillOpacity =.8; var columnTemplate = series.columns.template; columnTemplate.strokeWidth = 2; columnTemplate.strokeOpacity = 1; var valueLabel = series.bullets.push(new am4charts.LabelBullet()); valueLabel.label.text = "{valueY}"; valueLabel.label.adapter.add("verticalCenter", (_, l) => l.dataItem && l.dataItem.valueY < 0? "top": "bottom"); valueLabel.label.adapter.add("dy", (_, l) => l.dataItem && l.dataItem.valueY < 0? 5:0); valueLabel.label.hideOversized = false; valueLabel.label.truncate = true; chart.maskBullets = false;
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; } #chartdiv { width: 100%; height: 500px; }
<script src="https://cdn.amcharts.com/lib/4/core.js"></script> <script src="https://cdn.amcharts.com/lib/4/charts.js"></script> <script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script> <div id="chartdiv"></div>
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