Line Chart
A line chart is a type of chart used to show information that changes over time. Line charts are created by plotting a series of several points and connecting them with a straight line.
Simple Example
For a line chart we must define an rx.recharts.line() component for each set of values we wish to plot. Each rx.recharts.line() component has a data_key which clearly states which variable in our data we are tracking. In this simple example we plot pv and uv as separate lines against the name column which we set as the data_key in rx.recharts.x_axis.
def line_simple():
return rx.recharts.line_chart(
rx.recharts.line(
data_key="pv",
),
rx.recharts.line(
data_key="uv",
),
rx.recharts.x_axis(data_key="name"),
rx.recharts.y_axis(),
data=data,
width="100%",
height=300,
)Example with Props
Our second example uses exactly the same data as our first example, except now we add some extra features to our line graphs. We add a type_ prop to rx.recharts.line to style the lines differently. In addition, we add an rx.recharts.cartesian_grid to get a grid in the background, an rx.recharts.legend to give us a legend for our graphs and an rx.recharts.graphing_tooltip to add a box with text that appears when you pause the mouse pointer on an element in the graph.
def line_features():
return rx.recharts.line_chart(
rx.recharts.line(
data_key="pv",
type_="monotone",
stroke="#8884d8",
),
rx.recharts.line(
data_key="uv",
type_="monotone",
stroke="#82ca9d",
),
rx.recharts.x_axis(data_key="name"),
rx.recharts.y_axis(),
rx.recharts.cartesian_grid(stroke_dasharray="3 3"),
rx.recharts.graphing_tooltip(),
rx.recharts.legend(),
data=data,
width="100%",
height=300,
)Layout
The layout prop allows you to set the orientation of the graph to be vertical or horizontal. The margin prop defines the spacing around the graph,
Include margins around your graph to ensure proper spacing and enhance readability. By default, provide margins on all sides of the chart to create a visually appealing and functional representation of your data.
def line_vertical():
return rx.recharts.line_chart(
rx.recharts.line(
data_key="pv",
stroke=rx.color("accent", 9),
),
rx.recharts.line(
data_key="uv",
stroke=rx.color("green", 9),
),
rx.recharts.x_axis(type_="number"),
rx.recharts.y_axis(
data_key="name", type_="category"
),
layout="vertical",
margin={
"top": 20,
"right": 20,
"left": 20,
"bottom": 20,
},
data=data,
height=300,
width="100%",
)Dynamic Data
Chart data can be modified by tying the data prop to a State var. Most other
props, such as type_, can be controlled dynamically as well. In the following
example the "Munge Data" button can be used to randomly modify the data, and the
two select elements change the line type_. Since the data and style is saved
in the per-browser-tab State, the changes will not be visible to other visitors.
initial_data = data
class LineChartState(rx.State):
data: list[dict[str, Any]] = initial_data
pv_type: str = "monotone"
uv_type: str = "monotone"
def munge_data(self):
for row in self.data:
row["uv"] += random.randint(-500, 500)
row["pv"] += random.randint(-1000, 1000)
def line_dynamic():
return rx.vstack(
rx.recharts.line_chart(
rx.recharts.line(
data_key="pv",
type_=LineChartState.pv_type,
stroke="#8884d8",
),
rx.recharts.line(
data_key="uv",
type_=LineChartState.uv_type,
stroke="#82ca9d",
),
rx.recharts.x_axis(data_key="name"),
rx.recharts.y_axis(),
data=LineChartState.data,
margin={
"top": 20,
"right": 20,
"left": 20,
"bottom": 20,
},
width="100%",
height=300,
),
rx.hstack(
rx.button(
"Munge Data",
on_click=LineChartState.munge_data,
),
rx.select(
[
"monotone",
"linear",
"step",
"stepBefore",
"stepAfter",
],
value=LineChartState.pv_type,
on_change=LineChartState.set_pv_type,
),
rx.select(
[
"monotone",
"linear",
"step",
"stepBefore",
"stepAfter",
],
value=LineChartState.uv_type,
on_change=LineChartState.set_uv_type,
),
),
width="100%",
)To learn how to use the sync_id, x_axis_id and y_axis_id props check out the of the area chart documentation, where these props are all described with examples.
API Reference
rx.recharts.LineChart
A Line chart component in Recharts.
Valid Children
XAxisYAxisReferenceAreaReferenceDotReferenceLineBrushCartesianGridLegendGraphingTooltipLine