Tools for uncertainty propagation and measurement unit conversion — Outils pour la propagation des incertitudes et la conversion d'unités de mesure
GPL-3.0 License
tools for dealing with physical quantities: uncertainty propagation and unit conversion
MetroloPy is a pure python package and requires Python 3.5 or later and the SciPy stack (NumPy, SciPy and Pandas). It looks best in a Jupyter Notebook.
Install MetroloPy with pip install metrolopy
or
conda install -c conda-forge metrolopy
.
Physical quantities can then be represented in Python as gummy
objects with an uncertainty and (or) a unit:
MetroloPy can do much more including Monte-Carlo uncertainty propagation, generating uncertainty budget tables, and curve fitting. It can also handle expanded uncertainties, degrees of freedom, correlated quantities, and complex valued quantities. See:
A constant library has been added with physical constants that can be accessed
by name or alias with the constant
function. The search_constants
function
with no argument gives a listing of all built-in constants. Each constant
definition includes any correlations with other constants.
The Quantity
class has been added to represent a general numerical value
multiplied by a unit and the unit
function has been added to retrieve
Unit
instances from the unit library by name or alias. Unit
instances
can now be multiplied and divided by other Unit
instances to produce
composite units, can be multiplied and divided by numbers to produce
Quantity
instances or multiply or divide Quantity
instances. The
gummy
class is now a subclass of Quantity
with a nummy
value rather
than a subclass of nummy
. A QuantityArray
class has been introduced
to represent an array of values all with the same unit. Multiplying a Unit
instance by a list, tuple, or numpy array produces a QuantityArray
instance.
The immy
class has been introduced as an ummy
valued counterpart of the
jummy
class for representing complex values with uncertainties. immy
and jummy
values can now be displayed in a polar representation in addition
to a cartesian representation. immy
and jummy
.r and .phi properties
have been added to access the magnitude and argument of the values as a
complement to the .real and .imag properties.