-----Original Message----- From: Eric Lemings Sent: Wednesday, August 23, 2006 10:24 AM To: 'boost@lists.boost.org' Subject: RE: [boost] Boost Units library preview
-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Phil Richards Sent: Wednesday, August 23, 2006 8:58 AM To: boost@lists.boost.org Subject: Re: [boost] Boost Units library preview
On 2006-08-23, Matthias Troyer <troyer@itp.phys.ethz.ch> wrote:
- Nm would be a "dimension"
Not really. It is the unit.
Correct. A newton is a derived unit composed of base units, specifically kilogram, meter, and second. Meter is of course a base unit.
The dimension is: MASS * LENGTH^2 * TIME^2
Also correct. Every unit, whether a base unit or derived, has a corresponding dimension.
- 1 Nm would be a "quantity"
No. This is a measure. It has a specific unit and a specific value.
Here's an example of a quantity. The distance from here->| |<-to here is a quantity with a
Well there is supposed to be a lot more whitespace between those vertical bars. Let's try a quantity of horizontal length.
From here
------------------------- to here. Hopefully that will appear as a significant distance. Eric.
"Eric Lemings" <lemings@roguewave.com> writes:
Here's an example of a quantity. The distance from here->| |<-to here is a quantity with a
Well there is supposed to be a lot more whitespace between those vertical bars. Let's try a quantity of horizontal length.
Eric, For your own sake, get a new mailer, or at least a new mailreader. Or read Boost through gmane on a decent newsreader. Your posts are showing up just as you intend them, but your mailreader is making you think they're garbled. Regards, -- Dave Abrahams Boost Consulting www.boost-consulting.com
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David Abrahams -
Eric Lemings