- absolute-error x rprocedure
- x
- number
- r
- number
Usually computes (abs (- x r)) using exact rationals, but handles non-rational reals such as +inf.0 specially.
Examples:
> (absolute-error 1/2 1/2) 0 > (absolute-error 0.14285714285714285 1/7) 7.93016446160826e-18 > (absolute-error +inf.0 +inf.0) 0.0 > (absolute-error +inf.0 +nan.0) +inf.0 > (absolute-error 1e-20 0.0) 1e-20 > (absolute-error (- 1.0 (fp 4999999/5000000)) 1/5000000) 5.751132903242251e-18