BESSEL_YN — Bessel function of the second kind
Description
BESSEL_YN(N, X) computes the Bessel function of the second kind of
order N of X. This function is available under the name
BESYN as a GNU extension. If N and X are arrays,
their ranks and shapes shall conform.
BESSEL_YN(N1, N2, X) returns an array with the Bessel functions
of the first kind of the orders N1 to N2.
Syntax
RESULT = BESSEL_YN(N, X)
|
RESULT = BESSEL_YN(N1, N2, X)
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Arguments
| N | Shall be a scalar or an array of type INTEGER .
|
| N1 | Shall be a non-negative scalar of type INTEGER.
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| N2 | Shall be a non-negative scalar of type INTEGER.
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| X | Shall be a scalar or an array of type REAL;
for BESSEL_YN(N1, N2, X) it shall be scalar.
|
Return value
The return value is a scalar of type REAL. It has the same
kind as X.
Example
program test_besyn
real(8) :: x = 1.0_8
x = bessel_yn(5,x)
end program test_besyn
Specific names
| Name | Argument | Return type | Standard
|
DBESYN(N,X) | INTEGER N | REAL(8) | GNU extension
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| REAL(8) X | |
|
Notes
The transformational function uses a recurrence algorithm which might,
for some values of X, lead to different results than calls to
the elemental function.
Standard
Fortran 2008 and later, negative N is allowed as GNU extension
Class
Elemental function, except for the transformational function
BESSEL_YN(N1, N2, X)