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On 9/17/10 3:19 PM, Luc Maisonobe wrote:
Le 17/09/2010 19:55, Ted Dunning a écrit :
There are also on-line percentile estimation methods that require only a
single pass over the data in order to get good estimates of several quantile
at the same time.
If you are interested in getting an
Le 18/09/2010 16:16, Phil Steitz a écrit :
On 9/17/10 3:19 PM, Luc Maisonobe wrote:
Le 17/09/2010 19:55, Ted Dunning a écrit :
There are also on-line percentile estimation methods that require only a
single pass over the data in order to get good estimates of several
quantile
at the same
On 9/18/10 10:24 AM, Luc Maisonobe wrote:
Le 18/09/2010 16:16, Phil Steitz a écrit :
On 9/17/10 3:19 PM, Luc Maisonobe wrote:
Le 17/09/2010 19:55, Ted Dunning a écrit :
There are also on-line percentile estimation methods that require only a
single pass over the data in order to get good
Le 18/09/2010 17:36, Phil Steitz a écrit :
On 9/18/10 10:24 AM, Luc Maisonobe wrote:
Le 18/09/2010 16:16, Phil Steitz a écrit :
On 9/17/10 3:19 PM, Luc Maisonobe wrote:
Le 17/09/2010 19:55, Ted Dunning a écrit :
There are also on-line percentile estimation methods that require
only a
single
Le 18/09/2010 17:39, Luc Maisonobe a écrit :
Le 18/09/2010 17:36, Phil Steitz a écrit :
On 9/18/10 10:24 AM, Luc Maisonobe wrote:
Le 18/09/2010 16:16, Phil Steitz a écrit :
On 9/17/10 3:19 PM, Luc Maisonobe wrote:
Le 17/09/2010 19:55, Ted Dunning a écrit :
There are also on-line percentile
Hi list,
I've been looking at this fail method on DaemonController and it looks
like it is for giving a slightly friendlier error message back to the
console, rather than a stack trace. I was hoping I could use this to
report error messages during initialisation, but it looks like that is
not
Hi,
If I understand correctly, the argument against the present implementation
is that if several percentiles are requested, they all require the sorting
of the array. On the other hand, the speed-up version would no longer
be mathematically correct, as a rough approximate of the pivot would be
Le 18/09/2010 20:01, Dimitri Pourbaix a écrit :
Hi,
If I understand correctly, the argument against the present implementation
is that if several percentiles are requested, they all require the sorting
of the array.
Yes.
On the other hand, the speed-up version would no longer
be
Luc,
On the other hand, the speed-up version would no longer
be mathematically correct, as a rough approximate of the pivot would be
adopted.
No, the exact pivot is used. Its evaluation is only delayed. It would be
correct.
Given a **general** array, I do not think one can identify the
Le 18/09/2010 20:43, Dimitri Pourbaix a écrit :
Luc,
On the other hand, the speed-up version would no longer
be mathematically correct, as a rough approximate of the pivot would be
adopted.
No, the exact pivot is used. Its evaluation is only delayed. It would be
correct.
Given a
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Hi,
Just a small pedantry correction:
Luc, you wrote:
The evaluation that is only an approximation is the on-line algorithm,
because it does not keep all values in memory. However, even when
everything is in memory one should be aware that the result of the
computation is the sample
Ted,
O(n), not n
Expected case is n + n/2 + n/4 ... 2n
Yes, that I am already more incline to buy.
Dim.
Dimitri Pourbaix *
Institut d'Astronomie et d'Astrophysique * Don't worry, be
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