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[Octave-bug-tracker] [bug #56572] [octave forge] (statistics) kolmogorov
From: |
Kai Torben Ohlhus |
Subject: |
[Octave-bug-tracker] [bug #56572] [octave forge] (statistics) kolmogorov_smirnov_test_2(x, y) warns for duplicate values in x and y. |
Date: |
Tue, 2 Jul 2019 06:26:44 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36 |
URL:
<https://savannah.gnu.org/bugs/?56572>
Summary: [octave forge] (statistics)
kolmogorov_smirnov_test_2(x,y) warns for duplicate values in x and y.
Project: GNU Octave
Submitted by: siko1056
Submitted on: Tue 02 Jul 2019 12:26:42 PM CEST
Category: Octave Forge Package
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: Confirmed
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 5.1.0
Operating System: Any
_______________________________________________________
Details:
The original problem description is here:
https://lists.gnu.org/archive/html/help-octave/2019-06/msg00105.html
The docstring did not change since moving the function to the statistics
package:
https://octave.sourceforge.io/statistics/function/kolmogorov_smirnov_test_2.html
Some example to examine the problem:
pkg load statistics
## Create random vectors
rand ("seed", 0);
d1 = rand (100, 1);
d2 = rand (100, 1);
x = 0:0.05:1;
## Create cdfs to visualize kolmogorov_smirnov_test results
d1_cdf = empirical_cdf (x, d1);
d2_cdf = empirical_cdf (x, d2);
## Plot cdfs
figure (1);
plot (x, d1_cdf, '-', x, d2_cdf, '-');
## Run KS-test
disp ('first test without duplicate does not produce warning:');
P = kolmogorov_smirnov_test_2 (d1, d2)
## Add duplicate value to vectors then re-run test
disp ('second test containing duplicate produces warning:');
d1(end + 1) = 0.5;
d2(end + 1) = 0.5;
P = kolmogorov_smirnov_test_2 (d1, d2)
## Attempt to use cdfs instead of raw data as specified in help info
disp ('using cdf produces warning and incorrect results:');
P = kolmogorov_smirnov_test_2 (d1_cdf, d2_cdf)
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- [Octave-bug-tracker] [bug #56572] [octave forge] (statistics) kolmogorov_smirnov_test_2(x, y) warns for duplicate values in x and y.,
Kai Torben Ohlhus <=