30 Sep
2018
30 Sep
'18
5:27 p.m.
On Mon, Oct 1, 2018 at 8:17 AM Greg Ewing <greg.ewing@canterbury.ac.nz> wrote:
Chris Angelico wrote:
]That means that any representable number actually has to indicate a range of values centered on that value.
That's not always true -- it depends on the source of the information. For example, a reading of 5 seconds on a clock with 1 second resolution actually represents a value between 5 and 6 seconds.
So if you're fussy about rounding, you might want to round clock readings differently from measurements on a ruler.
True. I gave a number of assumptions, and if those assumptions don't hold, you may need to vary things. If you have something like you describe here, you probably want to round-to-zero or something. ChrisA