Set the number of figures to display

Hi,
I have a numeric indicator to display values in the order of 10^6 to 10^9, in SI notation. I have it set to a precision of one digit. So, my values look like:
1.2M, 10.5M, 325.7M, 1.3G and so on.
But instead of having a fixed number of digits after the decimal point, it would be more useful to have a fixed number of figures, such as:
1.18M, 10.5M, 325M, and 1.32G (3 significant figures)
or
1.182M, 10.45M 325.1M and 1.320G (4 significant figures)
How can I do this?
Thank you.

Porio,
Here is a VI that Bill VanArsdale submitted to OpenG ( http://openg.org ). It is called "number to string". This VI converts a "number" to a "string" showing one or more significant "digits" (default: 3). It'll do exactly what you are after.
Good luck,
-Jim
Attachments:
number_to_string.vi ‏35 KB

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fact: Oracle Forms Developer
fix:
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Yvan KOENIG (VALLAURIS, France) dimanche 4 septembre 2011 21:27:41
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
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Attachments:
Remove Element2.jpg ‏135 KB
Acquire Response1.jpg ‏266 KB
Remove Element1.jpg ‏135 KB

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Analog Acquisition.jpg ‏363 KB

Set the number of figures to display

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