prysm.mathops¶
A submodule which allows the user to swap out the backend for mathematics.
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class
prysm.mathops.
BackendShim
(src)¶ Bases:
object
A shim that allows a backend to be swapped at runtime.
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prysm.mathops.
jinc
(r)¶ Jinc.
The first zero of jinc occurs at r=pi
- Parameters
r (number) – radial distance
- Returns
the value of j1(x)/x for x != 0, 0.5 at 0
- Return type
float
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prysm.mathops.
is_odd
(int)¶ Determine if an interger is odd using binary operations.
- Parameters
int (int) – an integer
- Returns
true if odd, False if even
- Return type
bool
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prysm.mathops.
is_power_of_2
(value)¶ Check if a value is a power of 2 using binary operations.
- Parameters
value (number) – value to check
- Returns
true if the value is a power of two, False if the value is no
- Return type
bool
Notes
c++ inspired implementation, see SO: https://stackoverflow.com/questions/29480680/finding-if-a-number-is-a-power-of-2-using-recursion
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prysm.mathops.
sign
(x)¶ Sign of a number. Note only works for single values, not arrays.
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prysm.mathops.
kronecker
(i, j)¶ Kronecker delta function, 1 if i = j, otherwise 0.
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prysm.mathops.
gamma
(n, m)¶ Gamma function.