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#!/usr/bin/env python3
"""
This example shows quantities functionality.
.. :copyright: (c) 2014 by Jelte Fennema.
:license: MIT, see License for more details.
"""
# begin-doc-include
import quantities as pq
from pylatex import Document, Math, Quantity, Section, Subsection
if __name__ == "__main__":
doc = Document()
section = Section("Quantity tests")
subsection = Subsection("Scalars with units")
G = pq.constants.Newtonian_constant_of_gravitation
moon_earth_distance = 384400 * pq.km
moon_mass = 7.34767309e22 * pq.kg
earth_mass = 5.972e24 * pq.kg
moon_earth_force = G * moon_mass * earth_mass / moon_earth_distance**2
q1 = Quantity(
moon_earth_force.rescale(pq.newton),
options={"round-precision": 4, "round-mode": "figures"},
)
math = Math(data=["F=", q1])
subsection.append(math)
section.append(subsection)
subsection = Subsection("Scalars without units")
world_population = 7400219037
N = Quantity(
world_population,
options={"round-precision": 2, "round-mode": "figures"},
format_cb="{0:23.17e}".format,
)
subsection.append(Math(data=["N=", N]))
section.append(subsection)
subsection = Subsection("Scalars with uncertainties")
width = pq.UncertainQuantity(7.0, pq.meter, 0.4)
length = pq.UncertainQuantity(6.0, pq.meter, 0.3)
area = Quantity(
width * length,
options="separate-uncertainty",
format_cb=lambda x: "{0:.1f}".format(float(x)),
)
subsection.append(Math(data=["A=", area]))
section.append(subsection)
doc.append(section)
doc.generate_pdf("quantities_ex", clean_tex=False)
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