https://bugs.freedesktop.org/show_bug.cgi?id=77951

--- Comment #6 from DF <devonfy...@gmail.com> ---
For the last numeric example, 0.000890 is already 3 significant figures, and
yes 0.00 is meaningless. From left to right, you start counting your figures
from the first non-zero. Leading zeros don't count.

Significant figures are an integral part in taking measurements hence why it is
drilled into undergraduate science students (and likely engineers) and is
ubiquitous in research. This is not an enhancement which I thought up
overnight, I've been finding the lack of this feature a nuisance for years and
found it to be void of all spreadsheet software I've tried sofar (and I've
looked). I think it would make a great addition for productivity. I've
consulted others (who use Excel) and agreed this would be a useful feature.

A quick search shows me this is a commonplace, and there is no solution other
than workarounds such as using scientific notation, or using a formula.
http://spreadsheetpage.com/index.php/tip/rounding_to_n_significant_digits/
http://www.eng-tips.com/viewthread.cfm?qid=231129
https://forum.openoffice.org/en/forum/viewtopic.php?f=9&t=25658
http://www.faculty.umassd.edu/michele.mandrioli/172cbook/fCHM1.B.3.html
I've looked extensively through feature requests too, and found none.

As for implementing it, it would likely be an option between displaying
specified number of decimal places or significant figures.

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