chore: add isNumber assertion in plot/vega/axis/ctor/lib/band-position

[Sachinn-64]

Resolves None.

Description

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This pull request:

• chore: add isNumber assertion in plot/vega/axis/ctor/lib/band-position

Related Issues

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• None

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@stdlib-js/reviewers

[stdlib-bot]

PR Commit Message

chore: add isNumber assertion in `plot/vega/axis/ctor/lib/band-position`

PR-URL: https://github.com/stdlib-js/stdlib/pull/10780

Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Please review the above commit message and make any necessary adjustments.