Contents:
GSL::M_E
The base of exponentials, e
GSL::M_LOG2E
The base-2 logarithm of e, log_2(e)
GSL::M_LOG10E
The base-10 logarithm of e, log_10(e)
GSL::M_SQRT2
The square root of two, sqrt(2)
GSL::M_SQRT1_2
The square root of one-half, sqrt(1/2)
GSL::M_SQRT3
The square root of three, sqrt(3)
GSL::M_PI
The constant pi
GSL::M_PI_2
Pi divided by two
GSL::M_PI_4
Pi divided by four
GSL::M_SQRTPI
The square root of pi
GSL::M_2_SQRTPI
Two divided by the square root of pi
GSL::M_1_PI
The reciprocal of pi, 1/pi
GSL::M_2_PI
Twice the reciprocal of pi, 2/pi
GSL::M_LN10
The natural logarithm of ten, ln(10)
GSL::M_LN2
The natural logarithm of ten, ln(2)
GSL::M_LNPI
The natural logarithm of ten, ln(pi)
GSL::M_EULER
Euler's constant
GSL::POSINF
The IEEE representation of positive infinity, computed from the expression +1.0/0.0.
GSL::NEGINF
The IEEE representation of negative infinity, computed from the expression -1.0/0.0.
GSL::NAN
The IEEE representation of the Not-a-Number symbol, computed from the ratio 0.0/0.0.
GSL::isnan(x)
This returns 1 if x is not-a-number.
GSL::isnan?(x)
This returns true if x is not-a-number, and false otherwise.
GSL::isinf(x)
This returns +1 if x is positive infinity, -1 if x is negative infinity and 0 otherwise. NOTE: In Darwin9.5.0-gcc4.0.1, this method returns 1 for -inf.
GSL::isinf?(x)
This returns true if x is positive or negative infinity, and false otherwise.
GSL::finite(x)
This returns 1 if x is a real number, and 0 if it is infinite or not-a-number.
GSL::finite?(x)
This returns true if x is a real number, and false if it is infinite or not-a-number.
GSL::log1p(x)
This method computes the value of log(1+x) in a way that is accurate for small x. It provides an alternative to the BSD math function log1p(x).
GSL::expm1(x)
This method computes the value of exp(x)-1 in a way that is accurate for small x. It provides an alternative to the BSD math function expm1(x).
GSL::hypot(x, y)
This method computes the value of sqrt{x^2 + y^2} in a way that avoids overflow.
GSL::hypot3(x, y, z)
Computes the value of sqrt{x^2 + y^2 + z^2} in a way that avoids overflow.
GSL::acosh(x)
This method computes the value of arccosh(x).
GSL::asinh(x)
This method computes the value of arcsinh(x).
GSL::atanh(x)
This method computes the value of arctanh(x).
These methods above can take argument x of Integer, Float, Array, Vector or Matrix.
GSL::ldexp(x)
This method computes the value of x * 2^e.
GSL::frexp(x)
This method splits the number x into its normalized fraction f and exponent e, such that x = f * 2^e and 0.5 <= f < 1. The method returns f and the exponent e as an array, [f, e]. If x is zero, both f and e are set to zero.
GSL::pow_int(x, n)
This routine computes the power x^n for integer n. The power is computed efficiently -- for example, x^8 is computed as ((x^2)^2)^2, requiring only 3 multiplications.
GSL::pow_2(x)
GSL::pow_3(x)
GSL::pow_4(x)
GSL::pow_5(x)
GSL::pow_6(x)
GSL::pow_7(x)
GSL::pow_8(x)
GSL::pow_9(x)
These methods can be used to compute small integer powers x^2, x^3, etc. efficiently.
GSL::SIGN(x)
GSL::sign(x)
Return the sign of x. It is defined as ((x) >= 0 ? 1 : -1). Note that with this definition the sign of zero is positive (regardless of its IEEE sign bit).
GSL::is_odd(n)
GSL::IS_ODD(n)
Evaluate to 1 if n is odd and 0 if n is even. The argument n must be of Fixnum type.
GSL::is_odd?(n)
GSL::IS_ODD?(n)
Return true if n is odd and false if even.
GSL::is_even(n)
GSL::IS_EVEN(n)
Evaluate to 1 if n is even and 0 if n is odd. The argument n must be of Fixnum type.
GSL::is_even?(n)
GSL::IS_even?(n)
Return true if n is even and false if odd.
GSL::max(a, b)
GSL::MAX(a, b)
GSL::min(a, b)
GSL::MIN(a, b)
GSL::fcmp(a, b, epsilon = 1e-10)
This method determines whether x and y are approximately equal to a relative accuracy epsilon.
GSL::equal?(a, b, epsilon = 1e-10)
GSL::VERSION
GSL version
GSL::RB_GSL_VERSION
GSL::RUBY_GSL_VERSION
Ruby/GSL version
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