Package Scientific :: Package Functions :: Module Derivatives :: Class DerivVar

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Class DerivVar

Numerical variable with automatic derivatives of arbitrary order

Instance Methods

__abs__(self)

__add__(self, other)

__cmp__(self, other)

__coerce__(self, other)

__div__(self, other)

list

__getitem__(self, order)
Returns: a list of all derivatives of the given order

__init__(self, value, index=0, order=1, recursive=None)

__mul__(self, other)

__neg__(self)

__nonzero__(self)

__pos__(self)

__pow__(self, other, z=None)

__radd__(self, other)

__rdiv__(self, other)

__repr__(self)

__rmul__(self, other)

__rpow__(self, other)

__rsub__(self, other)

__str__(self)

__sub__(self, other)

arccos(self)

arcsin(self)

arctan(self)

arctan2(self, other)

cos(self)

cosh(self)

exp(self)

log(self)

log10(self)

sign(self)

sin(self)

sinh(self)

sqrt(self)

tan(self)

tanh(self)

DerivVar

toOrder(self, order)
Returns: a DerivVar object with a lower derivative order

Method Details

getitem(self, order)
(Indexing operator)

Parameters:

order (int) - derivative order

Returns: list

a list of all derivatives of the given order

Raises:

ValueError - if order < 0 or order > self.order

init(self, value, index=0, order=1, recursive=None)
(Constructor)

Parameters:

value (number) - the numerical value of the variable
index (int) - the variable index, which serves to distinguish between variables and as an index for the derivative lists. Each explicitly created instance of DerivVar must have a unique index.
order (int) - the derivative order

Raises:

ValueError - if order < 0

toOrder(self, order)

Parameters:

order (int) - the highest derivative order to be kept

Returns: DerivVar

a DerivVar object with a lower derivative order

Class DerivVar

__getitem__(self, order) (Indexing operator)

__init__(self, value, index=0, order=1, recursive=None) (Constructor)

toOrder(self, order)

getitem(self, order)
(Indexing operator)

init(self, value, index=0, order=1, recursive=None)
(Constructor)