## mikofski/Quantities

version 1.3.0.0 (23.4 KB) by
Quantities is an units and uncertainties package for MATLAB.

Updated 17 Aug 2015

From GitHub

Quantities is an units and uncertainties package for MATLAB.
Installation
============
Clone or download the Quantities package to your MATLAB folder as `+Quantities`.

Usage
=====
1. Construct a units registry, which contains all units, constants, prefixes and
dimensions.

>> ureg = Quantities.unitRegistry

ureg =

Map with properties:

Count: 279
KeyType: char
ValueType: any

2. Optionally pass `verbosity` parameter to `unitRegistry` to see list of units

>> ureg = Quantities.unitRegistry('v',2)

3. Units and constants can be indexed from the `unitRegsitry` using their name
or alias. The `unit`, `constant` and `quantity` class all subclass to
`double` so you can perform any operation on them. Combining a `double` with
a `unit` creates a `quantity` class object.

>> T1 = 45*ureg('celsius')
T1 =
45 ± 0 [degC];

>> T2 = 123.3*ureg.degC
T2 =
123.3 ± 0 [degC];

4. Perform operations. All units are converted to base.

>> T2.to_base
ans =
396.45 ± 0 [kelvin];

>> heat_loss = ureg.stefan_boltzmann_constant*(T1^4 - T2^4)
heat_loss =
-819814 ± 0 [gram*second^-3];

>> heat_loss = ureg.stefan_boltzmann_constant*(T1.to_base^4 - T2.to_base^4)
heat_loss =
-819814 ± 0 [gram*second^-3];

5. Add uncertainty to quantities by calling constructor.

>> T3 = Quantities.quantity(56.2, 1.23, ureg.degC)
T3 =
56.2 ± 1.23 [degC];

>> heat_loss = ureg.stefan_boltzmann_constant*(T1^4 - T3^4)
heat_loss =
-86228.1 ± 9966.66 [gram*second^-3];

6. Convert output to different units.

>> heat_loss_kg = heat_loss.convert(ureg.kg/ureg.s^3)
heat_loss_kg =
-819.814 ± 0 [kilogram*second^-3];

7. Determine arbitrary conversion factor.

>> conversion_factor = ureg.mile.convert(ureg.km)
conversion_factor =
1.60934 ± 0 [kilometer];

### Cite As

Mark Mikofski (2022). mikofski/Quantities (https://github.com/mikofski/Quantities), GitHub. Retrieved .

##### MATLAB Release Compatibility
Created with R2015a
Compatible with any release
##### Platform Compatibility
Windows macOS Linux

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

#### tests

To view or report issues in this GitHub add-on, visit the GitHub Repository.
To view or report issues in this GitHub add-on, visit the GitHub Repository.