[#26463] New Features for the Array Module — Daniel Cohen <danielc2017@...>
To Whom it May Concern:
[#26488] Add Standard Deviation Function to Math Module — Daniel Cohen <danielc2017@...>
This patch adds a Standard Deviation function to the Math Module. It takes
Hi,
OK,
Hi,
Matz,
Hi,
On Tue, Nov 3, 2009 at 16:56, Yusuke ENDOH <mame@tsg.ne.jp> wrote:
On Nov 3, 2009, at 8:28 PM, Cameron McBride wrote:
2009/11/4 Yusuke ENDOH <mame@tsg.ne.jp>:
[#26492] HashWithIndifferentAccess to core — Urabe Shyouhei <shyouhei@...>
Hello,
Hi,
On Tue, Nov 3, 2009 at 6:48 AM, Yukihiro Matsumoto <matz@ruby-lang.org> wro=
Just a thought: What about implementing this with an option on Hash:new,
Hi,
Hi,
2009/11/6 Yukihiro Matsumoto <matz@ruby-lang.org>:
Hi,
Hi,
I'm not sure that it really makes sense to add any of this to core.
On Sat, Nov 7, 2009 at 10:21 AM, Rick DeNatale <rick.denatale@gmail.com> wrote:
On Nov 7, 2009, at 1:57 PM, Jeremy Kemper wrote:
On Sat, Nov 7, 2009 at 3:14 PM, James Edward Gray II
Hi,
[#26497] [Bug #2326] 1.8.7 Segmentation fault — Johan Holmberg <redmine@...>
Bug #2326: 1.8.7 Segmentation fault
Issue #2326 has been updated by Hongli Lai.
[#26523] [Bug #2330] Non systematic segmentation fault with autoload rubyspec — Marc-Andre Lafortune <redmine@...>
Bug #2330: Non systematic segmentation fault with autoload rubyspec
Issue #2330 has been updated by Marc-Andre Lafortune.
Hi,
Argh... I can't reproduce my minimal case scenario anymore. Maybe
1) The minimal test case
Hi,
[#26540] [Bug #2336] pathname compare fails in windows — Roger Pack <redmine@...>
Bug #2336: pathname compare fails in windows
[#26560] [Feature #2340] Removing YAML/Syck — Yui NARUSE <redmine@...>
Feature #2340: Removing YAML/Syck
Issue #2340 has been updated by Yui NARUSE.
On Nov 6, 2009, at 4:02 AM, Yui NARUSE wrote:
> > Issue #2340 has been updated by Yui NARUSE.
Jon wrote:
> > If you're looking at alternatives, does http://pyyaml.org/wiki/LibYAML
On Sat, Nov 07, 2009 at 12:59:25AM +0900, NARUSE, Yui wrote:
Aaron Patterson wrote:
On Sat, Nov 07, 2009 at 09:21:06PM +0900, NARUSE, Yui wrote:
On Sat, Nov 7, 2009 at 2:52 PM, Aaron Patterson
2009/11/12 5:47, Charles Oliver Nutter wrote:
On Fri, Nov 6, 2009 at 16:00, James Edward Gray II
On Nov 6, 2009, at 9:48 AM, Nikolai Weibull wrote:
James Edward Gray II wrote:
On Fri, Nov 6, 2009 at 18:38, Joel VanderWerf <vjoel@path.berkeley.edu> wro=
Issue #2340 has been updated by Yui NARUSE.
[#26563] [Bug #2343] Timeout.timeout doesn't raise Timeout::Error by default — Hongli Lai <redmine@...>
Bug #2343: Timeout.timeout doesn't raise Timeout::Error by default
[#26623] Re: [ruby-cvs:32896] Ruby:r25678 (trunk): * ext/dl/cptr.c (rb_dlptr_s_malloc, rb_dlptr_initialize): adding — Tanaka Akira <akr@...>
In article <200911062250.nA6Mo69d010341@ci.ruby-lang.org>,
In article <87y6mhb180.fsf@fsij.org>,
On Thu, Nov 12, 2009 at 11:54:49AM +0900, Tanaka Akira wrote:
[#26632] [Feature #2347] Math::INFINITY — Marc-Andre Lafortune <redmine@...>
Feature #2347: Math::INFINITY
2009/11/9 Marc-Andre Lafortune <redmine@ruby-lang.org>:
[#26635] [Feature #2348] RBTree Should be Added to the Standard Library — James Gray <redmine@...>
Feature #2348: RBTree Should be Added to the Standard Library
Issue #2348 has been updated by James Gray.
Hi,
Hi,
Hi,
Yusuke ENDOH wrote:
2010/3/22 Bill Kelly <billk@cts.com>:
[#26650] [Feature #2350] Unicode specific functionality on String in 1.9 — Manfred Stienstra <redmine@...>
Feature #2350: Unicode specific functionality on String in 1.9
Issue #2350 has been updated by Yusuke Endoh.
On Thu, Mar 25, 2010 at 14:45, Yusuke Endoh <redmine@ruby-lang.org> wrote:
(2010/03/26 0:02), Nikolai Weibull wrote:
On Thu, Mar 25, 2010 at 18:24, NARUSE, Yui <naruse@airemix.jp> wrote:
On Thu, Mar 25, 2010 at 19:33, Nikolai Weibull <now@bitwi.se> wrote:
The problem is that the definition of #upcase doesn't only depend on the
On Fri, Mar 18, 2011 at 11:53, Magnus Holm <judofyr@gmail.com> wrote:
[#26652] [Bug #2351] system() hardlinked to /bin/sh — Marcus Franke <redmine@...>
Bug #2351: system() hardlinked to /bin/sh
Issue #2351 has been updated by Motohiro KOSAKI.
[#26668] [Bug #2353] hash.c:setenv causes crashes in Solaris — Christian Höltje <redmine@...>
Bug #2353: hash.c:setenv causes crashes in Solaris
[#26704] Maintainer confirmation process done. — "Yugui (Yuki Sonoda)" <yugui@...>
I'm sorry for my closing the maintainer confirmation process so late.
On Thu, Nov 12, 2009 at 05:29:55PM +0900, Yugui (Yuki Sonoda) wrote:
Aaron Patterson wrote:
[#26722] [Bug #2362] undefined variable has value? — Vit Ondruch <redmine@...>
Bug #2362: undefined variable has value?
[#26735] warnings on build — Roger Pack <rogerdpack@...>
As an FYI, I get these at compile time:
[#26736] [Bug #2365] Matrix: poor handling of coercion errors [patch] — Marc-Andre Lafortune <redmine@...>
Bug #2365: Matrix: poor handling of coercion errors [patch]
Issue #2365 has been updated by Marc-Andre Lafortune.
Hi,
Hi,
[#26745] [Bug #2371] [BUG] thread_free: locking _mutex must be NULL — Chris Schlaeger <redmine@...>
Bug #2371: [BUG] thread_free: locking _mutex must be NULL
[#26753] (send #2) cgi.rb cleanup — Ryan Davis <ryand-ruby@...>
(not sure why my previous email about this got dropped)
Hi,
[#26767] [Bug #2376] Kernel.__method__ rubyspec failures for 1.8.* — Vladimir Sizikov <redmine@...>
Bug #2376: Kernel.__method__ rubyspec failures for 1.8.*
[#26771] [Bug #2377] update documentation for IO#eof? — Roger Pack <redmine@...>
Bug #2377: update documentation for IO#eof?
[#26772] [Bug #2378] Regression in ParseDate.parsedate('nn-nn') — Vladimir Sizikov <redmine@...>
Bug #2378: Regression in ParseDate.parsedate('nn-nn')
Issue #2378 has been updated by Hiro Asari.
[#26774] Ruby constant lookup — Yehuda Katz <wycats@...>
Over the past six months or so, I have been working with the new Ruby 1.9
Hi,
Shugo,
Hi,
On Tue, Nov 17, 2009 at 1:29 AM, Shugo Maeda <shugo@ruby-lang.org> wrote:
Hi,
On Sun, Nov 22, 2009 at 8:08 PM, Shugo Maeda <shugo@ruby-lang.org> wrote:
On Mon, Nov 23, 2009 at 8:08 AM, Rick DeNatale <rick.denatale@gmail.com> wr=
Hi,
Shugo,
[#26788] [Bug #2380] IO#eof? behavior different with 1.9.1p243-mingw32 than other platforms — Ian Dees <redmine@...>
Bug #2380: IO#eof? behavior different with 1.9.1p243-mingw32 than other platforms
Issue #2380 has been updated by Vit Ondruch.
[#26837] [Bug #2389] REXML rails to format parsed SVGs created with inkscape — Alexey Froloff <redmine@...>
Bug #2389: REXML rails to format parsed SVGs created with inkscape
[#26852] Internals: #to_s .vs. #to_str? — Kurt Stephens <ks@...>
Is there a description of the semantic differences between #to_s and
[#26868] [Bug #2392] "Date.valid_civil?" issue in p383 — Ozgun Koyun <redmine@...>
Bug #2392: "Date.valid_civil?" issue in p383
[#26869] Caching #to_s for immutables (and a possible future for constant-folding) — Kurt Stephens <ks@...>
I have a proof-of-concept patch to MRI that caches #to_s values for
> =A0It reduces the number of #to_s Strings created during the MRI test sui=
The attached patch add caching of #to_s results to the main immutable
> Yes. =A0The MRI test suite runs at 45 sec with these changes and at 53 se=
I just ran rubyspec against it; ~ 5% time improvement.
Attached is a new version of the patch.
Hi,
On Tue, Dec 1, 2009 at 18:19, Yusuke ENDOH <mame@tsg.ne.jp> wrote:
Nikolai Weibull wrote:
[#26877] [Bug #2394] [BUG] pthread_mutex_lock: 22 revisited — Roger Pack <redmine@...>
Bug #2394: [BUG] pthread_mutex_lock: 22 revisited
[#26889] email from redmine — danielcavanagh@...
hi
[#26931] Re: something broke ruby floats — Ryan Davis <ryand-ruby@...>
CC'ing ruby-core@
[#26939] Methods with default params not at the end and with rest params — Vladimir Sizikov <vsizikov@...>
Hi,
Hi,
Hi Matz,
[#26943] [Bug #2412] CSV regression after revision 25952 — Alexey Froloff <redmine@...>
Bug #2412: CSV regression after revision 25952
[ruby-core:26510] Re: Add Standard Deviation Function to Math Module
Hi, I am attaching a preliminary version of the statistics module. It implements both kinds of standard deviation, as well as generating random numbers and finding values for a normal distribution among other things. I am currently working on a feature to perform linear curve fitting or regression on a set of points, however, I am running into trouble on how to sum the products of the x and y. For example, I have two enumerations xlist and ylist. Both are the same length. I want to multiply each pair and then add them to the running total. For example, (x1 * y1) + (x2 * y2) + ... for however many pairs I have. Any suggestions on how to do this cleanly would be much appreciated. The odd include for ruby.h is specific to my development environment. Sincerely, Daniel On Tue, Nov 3, 2009 at 7:39 AM, Daniel Cohen <danielc2017@gmail.com> wrote: > Matz, > Thanks for your support, I'll start working on a Statistics Module based on > [ruby-core:26491] > > Thanks, > Daniel > > > On Tue, Nov 3, 2009 at 6:54 AM, Yukihiro Matsumoto <matz@ruby-lang.org>wrote: > >> Hi, >> >> In message "Re: [ruby-core:26490] Re: Add Standard Deviation Function to >> Math Module" >> on Tue, 3 Nov 2009 11:05:36 +0900, Daniel Cohen < >> danielc2017@gmail.com> writes: >> >> |I was thinking that a Statistics module would be a good addition to Ruby. >> If >> |you decide that it would be worth creating one, I would be happy to >> |contribute. >> >> Although I have no knowledge and experience about statistics, I would >> love to support technically. [ruby-core:26491] would be a good >> starting point. >> >> matz. >> >> >
Attachments (1)
/**********************************************************************
statistics.c -
$Authors: nobu, dcohen $
created at: Tue Nov 03 09:42:52 JST 2009
Copyright (C) 2009 Nobuyoshi Nakada and Daniel Cohen
**********************************************************************/
#include <math.h>
#include <time.h>
#include <stdlib.h>
#include "../include/ruby/ruby.h"
#define SHIFT_FACTOR 100000
struct stat_stdev_args {
double sum, sum2;
long num;
};
static VALUE
stdev_i(VALUE elem, VALUE arg, int argc, VALUE *argv)
{
struct stat_stdev_args *a = (void *)arg;
double x = NUM2DBL(elem);
a->sum += x;
a->sum2 += pow(x, 2);
a->num++;
return Qnil;
}
/*
* call-seq:
* Statistics.stdev(enum) => double
*
* Computes the standard deviation of the elements in an <i>enum</i>
* If they are all numbers.
*/
static VALUE
stat_stddev(VALUE obj, VALUE list)
{
long i;
struct stat_stdev_args args;
double mean, stddev;
args.sum = args.sum2 = 0.0;
args.num = 0;
rb_iterate(rb_each, list, stdev_i, (VALUE)&args);
mean = args.sum / args.num;
stddev = sqrt(args.sum2 / args.num - mean*mean);
return DBL2NUM(stddev);
}
/*
* call-seq:
* Statistics.sum(enum) => double
*
* Computes the sum of the elements in an <i>enum</i>
* If they are all numbers.
*/
static VALUE
stat_sum(VALUE obj, VALUE list)
{
struct stat_stdev_args args;
args.sum = args.sum2 = 0.0;
args.num = 0;
rb_iterate(rb_each, list, stdev_i, (VALUE)&args);
return DBL2NUM(args.sum);
}
/*
* call-seq:
* Statistics.sum2(enum) => double
*
* Computes the sum of the square of each element in an <i>enum</i>
* If they are all numbers.
*/
static VALUE
stat_sum2(VALUE obj, VALUE list)
{
struct stat_stdev_args args;
args.sum = args.sum2 = 0.0;
args.num = 0;
rb_iterate(rb_each, list, stdev_i, (VALUE)&args);
return DBL2NUM(args.sum2);
}
/*
* call-seq:
* Statistics.stdevs(enum) => double
*
* Computes the n-1 or sample standard deviation of the elements in an <i>enum</i>
* If they are all numbers.
*/
static VALUE
stat_stddev_s(VALUE obj, VALUE list)
{
struct stat_stdev_args args;
double mean, stddevs;
args.sum = args.sum2 = 0.0;
args.num = 0;
rb_iterate(rb_each, list, stdev_i, (VALUE)&args);
mean = args.sum / args.num;
stddevs = sqrt((args.sum2 - (pow(args.sum,2) / args.num)) / (args.num - 1));
return DBL2NUM(stddevs);
}
/*
* call-seq:
* Statistics.mean(enum) => double
*
* Computes the mean of the elements in an <i>enum</i>
* If they are all numbers.
*/
static VALUE
stat_mean(VALUE obj, VALUE list)
{
struct stat_stdev_args args;
double mean, stddevs;
args.sum = args.sum2 = 0.0;
args.num = 0;
rb_iterate(rb_each, list, stdev_i, (VALUE)&args);
mean = args.sum / args.num;
return DBL2NUM(mean);
}
/*
* call-seq:
* Statistics.cdf(stdev, mean, x) => double
*
* Computes the Area under a Cumulative Distribution or Normal Distribution
* given the <i>standard deviation</i>, <i>mean</i> and <i>value</i> to compute
* the area to the left of
* If they are all numbers.
*/
static VALUE
stat_cdf(VALUE obj, VALUE sig, VALUE mu, VALUE x)
{
double numer, denom;
numer = x - mu;
denom = sig * sqrt(2);
return DBL2NUM(0.5+0.5*erf(numer/denom));
}
/*
* call-seq:
* Statistics.rand() => double
*
* Computes a random number between 0 and 1
* If they are all numbers.
*/
static VALUE
stat_rand(VALUE obj)
{
double r;
unsigned int iseed = (unsigned int)time(NULL);
srand(iseed);
r = (double)rand() / ((double)(RAND_MAX)+(double)(1));
return DBL2NUM(r * (double)(SHIFT_FACTOR) - floor(r * (double)(SHIFT_FACTOR)));
}
void
Init_statistics(void)
{
VALUE mStatistics = rb_define_module("Statistics");
rb_define_module_function(mStatistics, "stddev", stat_stddev, 1);
rb_define_module_function(mStatistics, "sum", stat_sum, 1);
rb_define_module_function(mStatistics, "sum2", stat_sum2, 1);
rb_define_module_function(mStatistics, "stddevs", stat_stddev_s, 1);
rb_define_module_function(mStatistics, "mean", stat_mean, 1);
rb_define_module_function(mStatistics, "cdf", stat_cdf, 3);
rb_define_module_function(mStatistics, "rand", stat_rand, 0);
}