On 4/9/2010 2:40 PM, Patrick Maupin wrote:
On Apr 9, 1:22 pm, monkeys paw<mon...@joemoney.net> wrote:
On 4/9/2010 3:43 AM, Bas wrote:
On Apr 7, 6:15 am, Patrick Maupin<pmau...@gmail.com> wrote:
I should stop making a habit of responding to myself, BUT. This isn't
quite an acre in square feet. I just saw the 43xxx and assumed it
was, and then realized it couldn't be, because it wasn't divisible by
10. (I used to measure land with my grandfather with a 66 foot long
chain, and learned at an early age that an acre was 1 chain by 10
chains, or 66 * 66 * 10 = 43560 sqft.)
That's an exact number, and 208 is a poor approximation of its square
root.
There is no need to remember those numbers for the imperially
challenged people:
In [1]: import scipy.constants as c
scipy.constants ??
doesn't work for me.
In [2]: def acre2sqft(a):
...: return a * c.acre / (c.foot * c.foot)
...:
In [3]: acre2sqft(1)
Out[3]: 43560.0
Cheers,
Bas
Basically, he's saying that, instead of remembering the very simple
"66" and "10" values, you can download and install a multi-megabyte
gzipped tar file for the scipy project. ;-)
(Of course, you get a few nice functions thrown in for free along with
your constants, but downloading scipy for its constants is like
choosing a sports car for its cupholders.)
yea, the 66 foot chain story is a good one, i cant forget that.
Appreciate the help, i just looked up the SciPY Project download,
it is 40 MB. I'm gonna check it out none the less...
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