scipy.special.i1e¶
-
scipy.special.
i1e
(x) = <ufunc 'i1e'>¶ Exponentially scaled modified Bessel function of order 1.
Defined as:
i1e(x) = exp(-abs(x)) * i1(x)
- Parameters
- xarray_like
Argument (float)
- Returns
- Indarray
Value of the exponentially scaled modified Bessel function of order 1 at x.
Notes
The range is partitioned into the two intervals [0, 8] and (8, infinity). Chebyshev polynomial expansions are employed in each interval. The polynomial expansions used are the same as those in
i1
, but they are not multiplied by the dominant exponential factor.This function is a wrapper for the Cephes [1] routine
i1e
.References
- 1
Cephes Mathematical Functions Library, http://www.netlib.org/cephes/