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Chebyshev1Eval

Evaluate Chebyshev1 polynomials of order n at single or several points.

Interface 1​

INTERFACE
  MODULE PURE FUNCTION Chebyshev1Eval(n, x) RESULT(ans)
    INTEGER(I4B), INTENT(IN) :: n
    !! order of polynomial
    REAL(DFP), INTENT(IN) :: x
    !! point of evaluation, it should be between -1 and 1
    REAL(DFP) :: ans
    !! Evaluate Chebyshev1 polynomial of order n at point x
  END FUNCTION Chebyshev1Eval 
END INTERFACE

Interface 2​

INTERFACE
  MODULE PURE FUNCTION Chebyshev1Eval(n, x) RESULT(ans)
    INTEGER(I4B), INTENT(IN) :: n
    !! order of polynomial
    REAL(DFP), INTENT(IN) :: x(:)
    !! several points of evaluation
    REAL(DFP) :: ans(SIZE(x))
    !! Evaluate Chebyshev1 polynomial of order n at points x
  END FUNCTION Chebyshev1Eval 
END INTERFACE