Set minimum and maximum range of axes in charts_flutter - flutter

Question

How can I set the range in x axis in charts_flutter? My data sample is like (5000, 5.0),(5001, 25.2),(5002, 100.5),(5003, 75.8).
My code is
/// Example of a simple line chart.
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class SimpleLineChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
SimpleLineChart(this.seriesList, {this.animate});
/// Creates a [LineChart] with sample data and no transition.
factory SimpleLineChart.withSampleData() {
return SimpleLineChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
#override
Widget build(BuildContext context) {
return Container(
height: 300,
// decoration: const BoxDecoration(color: Color(0xff232d37)),
width: double.infinity,
padding:
const EdgeInsets.only(right: 18.0, left: 12.0, top: 24, bottom: 12),
child: charts.LineChart(seriesList, animate: animate),
);
}
/// Create one series with sample hard coded data.
static List<charts.Series<LinearSales, int>> _createSampleData() {
final data = [
LinearSales(5000, 5.0),
LinearSales(5001, 25.2),
LinearSales(5002, 100.5),
LinearSales(5003, 75.8),
];
return [
charts.Series<LinearSales, int>(
id: 'Sales',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
domainFn: (LinearSales sales, _) {
return sales.year;
},
measureFn: (LinearSales sales, _) {
return sales.sales;
},
data: data,
domainLowerBoundFn: (s, _) => 5000,
domainUpperBoundFn: (s, _) => 5010,
)
];
}
}
/// Sample linear data type.
class LinearSales {
final int year;
final double sales;
LinearSales(this.year, this.sales);
}
The charts looks like
It shows a straight line but I want x axis to start at 5000 and end on 5010. I tried setting it in
domainLowerBoundFn and domainUpperBoundFn but it still starts at 0. How do I fix it?
Ref: Charts Flutter Gallery

Answer 1

You can set domainAxis.
How about this?
child: charts.LineChart(
seriesList,
animate: animate,
domainAxis: const charts.NumericAxisSpec(
tickProviderSpec:
charts.BasicNumericTickProviderSpec(zeroBound: false),
viewport: charts.NumericExtents(5000.0, 5005.0),
),
),
or this?
child: charts.LineChart(
seriesList,
animate: animate,
domainAxis: const charts.NumericAxisSpec(
tickProviderSpec:
charts.BasicNumericTickProviderSpec(zeroBound: false),
),
),

Answer 2

You can use the next code for Y-axis:
primaryMeasureAxis: charts.NumericAxisSpec(
tickProviderSpec:
charts.BasicNumericTickProviderSpec(desiredTickCount: 3)),
Full example looks like:
ScatterPlotChart(
[seriesDistorted],
animate: true,
domainAxis: const NumericAxisSpec(
tickProviderSpec: BasicNumericTickProviderSpec(
// Vertical axis every 2 ticks from 0 to 10
dataIsInWholeNumbers: true,
zeroBound: false,
desiredTickCount: 6),
),
primaryMeasureAxis: const NumericAxisSpec(
tickProviderSpec: BasicNumericTickProviderSpec(desiredTickCount: 6)),
);