Module errorbar 

Error bar chart builder methods.

This module extends ErrorBarArtist with a fluent API for configuring error bar properties. Since Axes::errorbar returns Result<ErrorBarArtist>, these builder methods can be chained directly on the return value:

let eb = ax.errorbar(&x, &y)?
    .yerr_symmetric(&errs)
    .cap_size(5.0)
    .line_width(1.5)
    .color(Color::TAB_RED)
    .label("Measurements");
ax.add_errorbar(eb);