Hi,
for e.g., 1 order of magnitude : 10.
2 order of magnitude: 100.
Also for e.g., x=9.3, then x is 1 order of magnitude.
So nearest order of magnitude might be something like rounding off !
I would phrase things a little differently, and say to round to the nearest power of 10. For example, 1, 10, 100, ... or 0.1, 0.01,....
Examples:
680 meters gets rounded to 1000 meters.
2350 m also gets rounded to 1000 m.
0.9 m → 1 m
0.2 m → 0.1 m
A value like 4 m is tricky. While closer to 1 m than 10 m on a linear scale, it is actually closer to 10 m on a logarithmic scale. So it becomes 10 m, to the nearest order of magnitude.
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