Yes, it does (help) ... -M At 2018-03-23 19:35, you wrote:
I suppose so... Keep in mind that the floating point standard can represent integers (if they are not too large - after 2^53 it starts losing the ability to represent some integers). One way of looking at it is this: ":!.20 *:%:5 5.0000000000000008882 ":!.20 %:*:5 Another way of looking at it is this: 5 - %:*:5 5 - *:%:5 _8.88178e_16 I hope this helps, -- Raul On Fri, Mar 23, 2018 at 3:31 PM, Martin Kreuzer <[email protected]> wrote: > Looks like I have been mislead by > datatype 5 > integer > datatype %: *: 5 > floating > datatype *: %: 5 > floating > -M > At 2018-03-23 18:25, you wrote: >> *:5 is 25 which has an integer square root, so %: *: 5 has a result >> which is exactly 5 >> >> %:5 does not have an integer result, but instead has a floating point >> (approximate) result, so *: %: 5 has a result which is approximately >> 5. >> >> -- >> Raul >> >> >> >> >> On Fri, Mar 23, 2018 at 2:04 PM, Martin Kreuzer <[email protected]> >> wrote: >> > Having read through >> > http://code.jsoftware.com/wiki/Essays/Tolerant_Comparison >> > (as far as I managed to follow the reasoning) >> > I tried these examples: >> >> > 5 (=!.0) %: *: 5 >> > 1 >> > 5 (=!.0) *: %: 5 >> > 0 >> >> > 5 - %: *: 5 >> > 0 >> > 5 - *: %: 5 >> > _8.88178e_16 >> > (*:&%: - %:&*:) 5 >> > 8.88178e_16 >> >> > and have been wondering since how/why the order of evaluation would make >> > a >> > difference (having expected it to throw a zero in *both* cases). >> > I'm aware of the the asymmetric interval boundaries x*1-t ; x%1-t but >> > can't >> > figure out whether they might be involved in the differing of results, >> > as >> > the tolerance is set to zero. >> >> > Anybody volunteering with a layman's explanation..? >> >> > -M >> >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
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