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| real(kind=wp) function | wp_csevl (X, CS, N) |
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| real(kind=ep1) function | ep_csevl (X, CS, N) |
| | Quad precision version of wp_csevl. More...
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◆ ep_csevl()
| real(kind=ep1) function special_functions_gbl::cfp_csevl::ep_csevl |
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real(kind=ep1) |
X, |
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real(kind=ep1), dimension(*) |
CS, |
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integer |
N |
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Quad precision version of wp_csevl.
◆ wp_csevl()
| real(kind=wp) function special_functions_gbl::cfp_csevl::wp_csevl |
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real(kind=wp) |
X, |
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real(kind=wp), dimension(*) |
CS, |
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integer |
N |
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***PURPOSE Evaluate a Chebyshev series.
***LIBRARY SLATEC (FNLIB)
***CATEGORY C3A2
***TYPE REAL(kind=wp) (CSEVL-S, wp_csevl-D)
***KEYWORDS CHEBYSHEV SERIES, FNLIB, SPECIAL FUNCTIONS
***AUTHOR Fullerton, W., (LANL)
***DESCRIPTION
Evaluate the N-term Chebyshev series CS at X. Adapted from
a method presented in the paper by Broucke referenced below.
Input Arguments --
X value at which the series is to be evaluated.
CS array of N terms of a Chebyshev series. In evaluating
CS, only half the first coefficient is summed.
N number of terms in array CS.
***REFERENCES R. Broucke, Ten subroutines for the manipulation of
Chebyshev series, Algorithm 446, Communications of
the A.C.M. 16, (1973) pp. 254-256.
L. Fox and I. B. Parker, Chebyshev Polynomials in
Numerical Analysis, Oxford University Press, 1968,
page 56.
***ROUTINES CALLED F1MACH, XERMSG
***REVISION HISTORY (YYMMDD)
770401 DATE WRITTEN
890831 Modified array declarations. (WRB)
890831 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
900315 CALLs to XERROR changed to CALLs to XERMSG. (THJ)
900329 Prologued revised extensively and code rewritten to allow
X to be slightly outside interval (-1,+1). (WRB)
920501 Reformatted the REFERENCES section. (WRB)
The documentation for this interface was generated from the following file:
