On 29-Jun-06, at 6:38 PM, John Randall wrote:
dly wrote:
Yes thank you this is why I prefaced this with IMD (in my dreams)
other than with here are all the other great languages that do this
What great languages do this? While Maple and Mathematica do symbolic
calculations: they are subject to the same problems concerning loss of
signficance when it comes to evaluation. Plus you pay a huge
performance
penalty.
The fact is that you can obtain accurate answers without
significant digit
arithmetic, as I have pointed out many times. However, you need
something
different from a naive algorithm.
Bst wishes,
John
Sorry John!
You are reading my quote out of context
I meant
Yes. I have also not seen this built into a language.
and Thus the preface IMD (in my dreams)
and NOT the preface "here are other great languages..."
and "why can't you put this into J"
Which I specifically stated I did not request at least not for my
benefit alone.
Yes thank you this is why I prefaced this with IMD (in my dreams)
other than with here are all the other great languages that do this
and why can't you put this into J
Donna
[EMAIL PROTECTED]
On 29-Jun-06, at 6:26 PM, Miller, Raul D wrote:
Randy MacDonald wrote:
Personally I've never seen significant digit aritmetic (which
is only meaningful for display of numbers) built in to a language.
Where the number of significant digits is some [usually easily
determined] constant, facilities such as 9!:11, etc. are sufficient.
Of course, that's not really significant digit arithmetic.
Where significant digits are not constant, usually it's important
to deal with the issue, and most of the techniques (standard
deviation/variance, interval arithmetic, checking the results
using some form of test, or whatever else) aren't really
significant digit arithmetic.
...which might count as an explanation of what you've seen
(or not seen).
Donna
[EMAIL PROTECTED]
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