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v2.2

Spline Series

Series type for visualizing a list of points (pair of X and Y coordinates), with an automatic polynomial interpolation that produces smooth curves.

Spline seriesSpline series

Creating Spline series​

series = chart.add_spline_series()

Adding Data​

There are many different ways you can add data to a Spline series. The most basic way is to specify two lists of number values, one for X coordinates, and another for Y coordinates.

# Using x and y lists:
x_values = [0, 1, 2, 3]
y_values = [1, 3, 2, 4]
series.add(x_values, y_values)

Please refer to Adding Data to Charts section to see other available ways of adding data to a series.

Schema and Data Mapping​

This section works the same as for Line, to avoid duplication of guides, please refer to the section under Line

Customizing Fill Coloring​

Using Solid Point Color​

import lightningchart as lc

series.set_point_color((255, 0, 0))
series.set_point_color('#FF0000')
series.set_point_color('red')

Using Solid /line Color​

import lightningchart as lc

series.set_line_color((255, 0, 0))
series.set_line_color('#FF0000')
series.set_line_color('red')

Set Palette Coloring for Points​

chart = lc.ChartXY(title='ChartXY', theme=lc.Themes.Light)
series = chart.add_spline_series()


x_values = [0, 1, 2, 3]
y_values = [2, 3, 5, 7]
series.add(x_values, y_values)

# Define a palette for the point coloring to interpolate between red, yellow and green:
series.set_palette_point_coloring(
    steps=[
        {'value': 2, 'color': '#FF0000', 'label': 'Min'},
        {'value': 4, 'color': (255, 255, 0)},
        {'value': 7, 'color': 'green', 'label': 'Max'},
    ],
    look_up_property='y',
    interpolate=True,
)

# With formatted legend display:
series.set_palette_point_coloring(
    steps=[
        {'value': 0, 'color': '#0000FF'},
        {'value': 100, 'color': '#FF0000'},
    ],
    look_up_property='value',
    formatter_precision=2,           # Decimal places
    formatter_unit='mag',             # Unit suffix
    formatter_scale=1.5,              # Scale values
    formatter_type='scientific',      # 'standard', 'compact', 'engineering', 'scientific'
    formatter_operation='floor',      # 'none', 'round', 'ceil', 'floor'
)
Spline seriesSpline series

Set Palette Coloring for Lines​

chart = lc.ChartXY(title='ChartXY', theme=lc.Themes.Light)
series = chart.add_spline_series()


x_values = [0, 1, 2, 3]
y_values = [2, 3, 5, 7]
series.add(x_values, y_values)

# Define a palette for the line stroke to interpolate between red and green:
series.set_palette_line_coloring(
    steps=[
        {'value': 2, 'color': '#FF0000'},
        {'value': 7, 'color': 'green'},
    ],
    look_up_property='y',
    interpolate=True,
)
Spline seriesSpline series

Customizing Line Appearance​

Changing Line Thickness​

series.set_line_thickness(5)

Changing Line Pattern​

import lightningchart as lc

series.set_dashed(pattern="Dashed", thickness=3, color='#0000FF')

Available patterns include: "DashDotted", "Dashed", "DashedEqual", "DashedLoose", "Dotted", and "DottedDense".

Changing Point Shape​

series.set_point_shape('circle')

Available patterns include: "arrow", "circle", "cross", "diamond", "minus", "plus", "square", "star" and "triangle".

Changing Point stroke style​

series.set_point_stroke_style(style='solid', thickness=2, color="#ff0000")

Changing Point size​

series.set_point_size(5)

Changing Point rotation​

series.set_point_rotation(45)

Enabling or disabling individual point color attributes​

series.set_individual_point_color_enabled(True)

Series Utility Methods​

This section works the same as for Line, to avoid duplication of guides, please refer to the section under Line

Legend​

Please see common legend section.

Examples​

Link to the examples