| Client-Side API Reference > FlexChart > wijmo.chart.analytics > TrendLine Class |
constructor(options?): TrendLine
Initializes a new instance of the TrendLine class.
A JavaScript object containing initialization data for the TrendLine Series.
Gets or sets the alternative style for the series. The values from this property will be used for negative values in Bar, Column, and Scatter charts; and for rising values in financial chart types like Candlestick, LineBreak, EquiVolume etc.
If no value is provided, the default styles will be used.
Gets or sets the name of the property that contains Y values for the series.
Gets or sets the name of the property that contains X values for the series.
Gets the ICollectionView object that contains the data for this series.
Gets or sets the array or ICollectionView object that contains the series data.
Gets or sets the series name.
The series name is displayed in the chart legend. Any series without a name does not appear in the legend.
Gets or sets the number of terms in a polynomial or fourier equation.
Set this value to an integer greater than 1. It gets applied when the fitType is set to wijmo.chart.analytics.TrendLineFitType.Polynomial or wijmo.chart.analytics.TrendLineFitType.Fourier.
Gets or sets the sample count for function calculation. The property doesn't apply for MovingAverage.
Gets or sets the shape of marker to use for each data point in the series. Applies to Scatter, LineSymbols, and SplineSymbols chart types.
Gets or sets the size(in pixels) of the symbols used to render this Series. Applies to Scatter, LineSymbols, and SplineSymbols chart types.
Gets or sets the series symbol style. Applies to Scatter, LineSymbols, and SplineSymbols chart types.
Gets or sets an enumerated value indicating whether and where the series appears.
approximate(x: number): number
Gets the approximate y value from the given x value.
The x value to be used for calculating the Y value.
drawLegendItem(engine: IRenderEngine, rect: Rect, index: number): void
Draw a legend item at the specified position.
The rendering engine to use.
The position of the legend item.
Index of legend item(for series with multiple legend items).
getDataRect(currentRect?: Rect, calculatedRect?: Rect): Rect
Returns series bounding rectangle in data coordinates.
If getDataRect() returns null, the limits are calculated automatically based on the data values.
The current rectangle of chart. This parameter is optional.
The calculated rectangle of chart. This parameter is optional.
getEquation(fmt?: Function): void
Gets the formatted equation string for the coefficients.
The formatting function for the coefficients. Returns formatted string on the basis of coefficients. This parameter is optional.
getPlotElement(pointIndex: number): any
Gets the plot element that corresponds to the specified point index.
The index of the data point.
hitTest(pt: any, y?: number): HitTestInfo
Gets a HitTestInfo object with information about the specified point.
The point to investigate, in window coordinates.
The Y coordinate of the point (if the first parameter is a number).
legendItemLength(): number
Returns number of series items in the legend.
measureLegendItem(engine: IRenderEngine, index: number): Size
Measures height and width of the legend item.
The rendering engine to use.
Index of legend item(for series with multiple legend items).
onRendered(engine: IRenderEngine): void
Raises the rendered event.
The IRenderEngine object used to render the series.
onRendering(engine: IRenderEngine, index: number, count: number): boolean
Raises the rendering event.
The IRenderEngine object used to render the series.
The index of the series to render.
Total number of the series to render.
Represents a trend line for FlexChart and FinancialChart.
A trendline is a line superimposed on a chart revealing the overall direction of data. You may define a different fit type for each TrendLine object that you add to the FlexChart series collection by setting the fitType property.