Sets up interactive printing for mechanics’ derivatives.
The main benefit of this is for printing of time derivatives; instead of displaying as Derivative(f(t),t), it will display f’ This is only actually needed for when derivatives are present and are not in a physics.mechanics object.
Examples
>>> # 2 lines below are for tests to function properly
>>> import sys
>>> sys.displayhook = sys.__displayhook__
>>> from sympy import Function, Symbol, diff
>>> from sympy.physics.mechanics import mechanics_printing
>>> f = Function('f')
>>> t = Symbol('t')
>>> x = Symbol('x')
>>> diff(f(t), t)
Derivative(f(t), t)
>>> mechanics_printing()
>>> diff(f(t), t)
f'
>>> diff(f(x), x)
Derivative(f(x), x)
>>> # 2 lines below are for tests to function properly
>>> import sys
>>> sys.displayhook = sys.__displayhook__
Function for printing of expressions generated in mechanics.
Extends SymPy’s StrPrinter; mprint is equivalent to: print sstr() mprint takes the same options as sstr.
Parameters: | expr : valid sympy object
settings : args
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Examples
>>> from sympy.physics.mechanics import mprint, dynamicsymbols
>>> u1 = dynamicsymbols('u1')
>>> print(u1)
u1(t)
>>> mprint(u1)
u1
Function for pretty printing of expressions generated in mechanics.
Mainly used for expressions not inside a vector; the output of running scripts and generating equations of motion. Takes the same options as SymPy’s pretty_print(); see that function for more information.
Parameters: | expr : valid sympy object
settings : args
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Examples
Use in the same way as pprint
Function for printing latex representation of mechanics objects.
For latex representation of Vectors, Dyadics, and dynamicsymbols. Takes the same options as SymPy’s latex(); see that function for more information;
Parameters: | expr : valid sympy object
settings : args
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Examples
>>> from sympy.physics.mechanics import mlatex, ReferenceFrame, dynamicsymbols
>>> N = ReferenceFrame('N')
>>> q1, q2 = dynamicsymbols('q1 q2')
>>> q1d, q2d = dynamicsymbols('q1 q2', 1)
>>> q1dd, q2dd = dynamicsymbols('q1 q2', 2)
>>> mlatex(N.x + N.y)
'\\mathbf{\\hat{n}_x} + \\mathbf{\\hat{n}_y}'
>>> mlatex(q1 + q2)
'q_{1} + q_{2}'
>>> mlatex(q1d)
'\\dot{q}_{1}'
>>> mlatex(q1 * q2d)
'q_{1} \\dot{q}_{2}'
>>> mlatex(q1dd * q1 / q1d)
'\\frac{q_{1} \\ddot{q}_{1}}{\\dot{q}_{1}}'