units 命令

常用示例

说明

GNU Units converts between different systems of measurement and performs unit arithmetic. It includes a comprehensive database of over 3000 units, including historical and esoteric measurements. In interactive mode, enter the source unit at the "You have:" prompt and the target unit at "You want:". Units checks dimensional compatibility and reports conformability errors for incompatible conversions. The program also functions as a scientific calculator with built-in functions (sin, cos, ln, exp, etc.). Complex expressions with units are supported.

参数

-f _filename_, --file _filename_

Use specified units database file.

-c, --check

Check that all units reduce to primitive units.

-o _format_, --output-format _format_

Specify numeric output format (printf-style).

-d _ndigits_, --digits _ndigits_

Set number of significant digits in output.

-e, --exponential

Use scientific (exponential) notation for output.

-t, --terse

Print only the conversion factor (for parsing).

--compact

Give compact output without operators.

-q, --quiet

Suppress statistics and prompts.

-v, --verbose

Show more detailed output.

--list-units

List all known units and exit.

--conformable

Show units conformable with the given expression.

-u _system_, --units _system_

Use alternative unit system (e.g., si, cgs, natural).

--locale _locale_

Force a specific locale.

--minus

Interpret - as subtraction (default).

--product

Interpret - as multiplication.

-V, --version

Print version and data file location.

-h, --help

Display help message.