我目前正在使用Oxyplot和演示示例(可以从那里下载https://github.com/oxyplot/oxyplot/archive/develop.zip),尤其是示例“ColumnSeriesDemo”。
这是执行时的样子:
代码:
public MainWindow()
{
this.InitializeComponent();
// Create some data
this.Items = new Collection<Item>
{
new Item {Label = "Apples", Value1 = 37, Value2 = 12, Value3 = 19},
new Item {Label = "Pears", Value1 = 7, Value2 = 21, Value3 = 9},
new Item {Label = "Bananas", Value1 = 23, Value2 = 2, Value3 = 29}
};
// Create the plot model
var tmp = new PlotModel { Title = "Column series", LegendPlacement = LegendPlacement.Outside, LegendPosition = LegendPosition.RightTop, LegendOrientation = LegendOrientation.Vertical };
// Add the axes, note that MinimumPadding and AbsoluteMinimum should be set on the value axis.
tmp.Axes.Add(new CategoryAxis { ItemsSource = this.Items, LabelField = "Label" });
tmp.Axes.Add(new LinearAxis { Position = AxisPosition.Left, MinimumPadding = 0, AbsoluteMinimum = 0 });
// Add the series, note that the BarSeries are using the same ItemsSource as the CategoryAxis.
tmp.Series.Add(new ColumnSeries { Title = "2009", ItemsSource = this.Items, ValueField = "Value1" });
tmp.Series.Add(new ColumnSeries { Title = "2010", ItemsSource = this.Items, ValueField = "Value2" });
tmp.Series.Add(new ColumnSeries { Title = "2011", ItemsSource = this.Items, ValueField = "Value3" });
this.Model1 = tmp;
this.DataContext = this;
}
我想有一个对数的Y轴。
在上面的代码中,我将第二个轴声明从
tmp.Axes.Add(new LinearAxis { Position = AxisPosition.Left, MinimumPadding = 0, AbsoluteMinimum = 0 });
至
tmp.Axes.Add(new LogarithmicAxis { MinorTickSize = 0, Minimum = 1, Maximum = 35, Title = "Log Axis", Position = AxisPosition.Left, Base = 10, TickStyle = TickStyle.Outside });
但是,执行代码时,结果如下:
据我了解,彩色部分应为空白,空白部分应为彩色。我想念什么?
最佳答案
我遇到了同样的问题,花了几个小时才找出可以解决问题的魔术属性,它的名称是..... BaseValue!
它是ColumnSeries的一个属性,因此在上面的代码中,只需更改创建ColumnSeries的位即可:
// Add the series, note that the BarSeries are using the same ItemsSource as the CategoryAxis.
tmp.Series.Add(new ColumnSeries { BaseValue = 1, Title = "2009", ItemsSource = this.Items, ValueField = "Value1" });
tmp.Series.Add(new ColumnSeries { BaseValue = 1, Title = "2010", ItemsSource = this.Items, ValueField = "Value2" });
tmp.Series.Add(new ColumnSeries { BaseValue = 1, Title = "2011", ItemsSource = this.Items, ValueField = "Value3" });
我还没有测试问题中的代码,但是我很确定这会起作用。
干杯!
关于WPF和Oxyplot : graph with CategoryAxis and LogarithmicAxis,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/33958195/