errorbar — Plot data with symmetric or asymmetric error bars for uncertainty, intervals, and MATLAB errorbar workflows.

errorbar visualizes uncertainty around data points using vertical or both-direction error bars. In RunMat it returns a plot handle, supports MATLAB-style symmetric and asymmetric forms, and participates in the same handle/property and marker-rendering system used by line-like plotting builtins.

How errorbar works in RunMat

• Vertical-only and both-direction error-bar forms are supported through the runtime and replay/render stack.
• The returned value is an error-bar handle that can be queried or updated through get and set.
• Cap size, line styling, marker appearance, display names, and related properties use the shared plotting object/property system.
• Error bars remain subplot-local and integrate naturally with legends and axes state.
• GPU-backed geometry is used when plotting-compatible buffers are available for the full input set; otherwise RunMat falls back to host plotting while preserving the same visible result.

How errorbar runs on the GPU

Dedicated GPU geometry generation covers supported vertical and both-direction error-bar workflows.

Markers continue to use the shared marker path so line/marker styling stays consistent with the rest of the plotting stack.

GPU memory and residency

errorbar preserves GPU residency when the direct error-bar packer path is available for the full input set. Marker rendering stays aligned with the shared marker path.

Examples

Plot symmetric vertical error bars

x = 1:5;
y = [2 3 2.5 4 3.5];
err = [0.2 0.3 0.1 0.4 0.2];
errorbar(x, y, err, err);

Plot asymmetric both-direction error bars

x = 1:4;
y = [3 4 2 5];
xn = [0.1 0.2 0.1 0.3];
xp = [0.2 0.3 0.2 0.4];
yn = [0.3 0.2 0.4 0.2];
yp = [0.4 0.3 0.5 0.3];
errorbar(x, y, xn, xp, yn, yp);

Style an error-bar object and label it for the legend

x = 1:5;
y = [1 2 1.5 3 2.5];
h = errorbar(x, y, 0.2*ones(size(x)), 0.2*ones(size(x)));
set(h, 'LineWidth', 2, 'DisplayName', 'measurement');
legend;

Related functions to explore

These functions work well alongside errorbar. Each page has runnable examples you can try in the browser.

stem, plot, legend, get, set

Open-source implementation

Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how errorbar works, line by line, in Rust.

• View errorbar.rs on GitHub
• Learn how the runtime works
• Found a bug? Open an issue with a minimal reproduction.

About RunMat

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