Rerun

Scalar

Scalar represents a single scalar value that can be plotted as a time series if logged over time.

Components and APIs

Primary component: scalar

Secondary components: scalar_plot_props, colorrgba, radius, label

Python APIs: log_scalar

Rust API: Scalar

Simple Example

"""Log a scalar over time."""
import numpy as np
import rerun as rr

rr.init("rerun_example_scalar", spawn=True)
rng = np.random.default_rng(12345)

value = 1.0
for step in range(100):
    rr.set_time_sequence("step", step)

    value += rng.normal()
    rr.log_scalar("scalar", value)