Function rgsl::blas::level1::drotg

pub fn drotg(a: &mut [f64], b: &mut [f64], c: &mut [f64], d: &mut [f64]) -> Value

This function computes a Givens rotation (c,s) which zeroes the vector (a,b),

[ c s ] [ a ] = [ r ]

[ -s c ] [ b ] [ 0 ]

The variables a and b are overwritten by the routine.