All Questions

Filter by
Sorted by
Tagged with
4
votes
1answer
208 views

Inconsistent simple simulation outcomes?

Bug introduced in 10.4 or earlier and persisting through 12.0.0 or later Two simple kinds of simulating the one-sided exact Fisher-test of obtaining at least 86 successes in 129 draws in a ...
17
votes
1answer
245 views

Possible bug in OrderDistribution? [Update: Confirmed by Wolfram Research and enqueued.]

Bug Introduced in 11.3 or earlier Initial testing indicates this has been addressed in 12.0 Observe: ...
3
votes
1answer
146 views

Log transformed histogram distribution

Bug introduced in 11.0.1 or earlier and persisting through 11.3.0 or later I try to get a Log transformed histogram data I get from a different program ...
14
votes
0answers
315 views

New issue or new setting(s) of Goodness-of-Fit Tests in 11.3@student edition

Bug introduced in 11.3 or earlier and persisting through 11.3.0 or later Just before upgrading to 11.3.0 on last Friday, i was having p-value results from 11.2.0. Not worrying about upgrade may ...
6
votes
0answers
174 views

Does DegreeGraphDistribution sample uniformly?

Bug introduced in 10.0 or earlier and persisting through 12.0 The first symptom (histogram below) is gone in 12.0. The second (fraction of connected graphs) persists, showing that the sampling is ...
1
vote
0answers
62 views

Variance of list of associations

Bug introduced in 10.4 and fixed in 11.1 Mean can calculate the mean of a list of associations: ...
7
votes
1answer
133 views

Histogram not plotting RandomVariate of EmpiricalDistribution

Bug introduced in 11.1 or earlier and fixed in 11.2 I have a seemingly odd case in 11.1 where a sample from an EmpiricalDistribution is not being plotted by ...
5
votes
1answer
133 views

PDF for MixtureDistribution fails in Dataset Query in 11.1

I have the results of a process involving FindDistribution as a Dataset of probability distributions. Attempting to plot the <...
6
votes
0answers
57 views

Problem with Probability and MultivariateHypergeometricDistribution (bug?)

Using the input ...
30
votes
2answers
977 views

Huge bug involving MultinormalDistribution?

Bug introduced in 8.0 or earlier and fixed in 11.1 I found a strange behavior regarding the CDF of the bivariate Normal distribution ...
8
votes
1answer
204 views

ProbabilityDistribution only accepts dx=1 for discrete distributions

Bug introduced in 10.4.1 or earlier and somewhat fixed in 12.0.0 This question maybe related to (95436) but neither its answer nor the documentation for ...
4
votes
1answer
207 views

Random Variate generating strange results when using ProbabilityDistribution

Bug introduced in 10.1 and fixed in 10.3 I have created a probability distribution that follows a general normal distribution, given by: $$ \frac{b *e^{-\left(\frac{\sqrt{(x-u )^2}}{a }\right)^{b }}}...
10
votes
1answer
126 views

FullSimplify on TransformedDistribution

Bug introduced in 8.0.0 and fixed in 10.3.0 Could someone check that I haven't gone mad? I would like to take the maximum of two $[0, 2 \pi]$ independent uniform random variables. ...
10
votes
2answers
180 views

Possible bug in VonMisesDistribution?

Bug introduced in 10.2 or earlier and fixed in 10.3 Observe: ...
5
votes
1answer
145 views

Is DistributionFitTest broken for some cases of TransformedDistribution targets?

Observe: ...
5
votes
1answer
109 views

Is this behavior of DistributionFitTest together with StableDistribution a bug?

Bug introduced in 9.0 or earlier and persisting through 11.0.1 or later I have been using DistributionFitTest to fit the following data: ...
9
votes
2answers
151 views

Why are Binormal and Multinormal giving me different results when I use NExpectation?

fixed in 10.1 (windows) Binormal and Multinormal can both be used to represent normal random variables: ...
9
votes
2answers
382 views

Median of Dataset in Mathematica 10

Bug introduced in 10.0 and fixed in 10.3 I'm having trouble calculating the median of a Dataset[] in Mathematica 10. The situation is as follows. Consider a ...
4
votes
2answers
145 views

Correlation test issues

No error in 10.0.2 When using Correlation[] function I sometimes get the strange warning: ...
9
votes
1answer
144 views

Why am I getting wildly incorrect results from FirstPassageTimeDistribution with inexact transition matrix?

Working on some large systems using DiscreteMarkovProcess, I changed the transition matrix to machine precision vs using exact values, which sped things up handily. ...
21
votes
4answers
478 views

Negative probability?

Bug introduced in 9.0.1 and fixed in 10.0.2 I am trying to get the sum of the squares of seven random variables, all uniformly distributed. This is what I tried. ...
11
votes
1answer
377 views

How does LocationTest choose its “AutomaticTest”?

Is there a way of determining how LocationTest chooses its "AutomaticTest"? Sometimes it's clear from the ...
6
votes
4answers
224 views

How do I emulate DiscreteUniformDistribution in Mathematica?

How do I define a function from scratch that emulates DiscreteUniformDistribution? As shown below, attempting to use ...
6
votes
1answer
214 views

Expectation of CauchyDistribution

Bug introduced in 8.0 or earlier and persisting through 11.0.1 I've noticed this strange behavior and I'm wondering if it's a bug. I define a Cauchy distribution: ...
15
votes
1answer
442 views

RandomVariate returns values outside the support of a PDF

Bug introduced in 8.0.1 and fixed in 10.2.0 Let $X$ be a random variable with pdf: dist = ProbabilityDistribution[1/(Abs[x]*Log[Abs[x]]^2), {x, -E^-2, E^-2}] ...
4
votes
1answer
276 views

EstimatedProcess hangs with documentation example

Not sure if this is a bug or a typo but for the first example of the ARMAProcess in Mathematica 9 we have: ...
10
votes
1answer
376 views

Incorrect means of order statistics for the standard normal distribution

Bug introduced in 8.0 and fixed in 9.0 OrderDistribution is new in 8.0 ...
16
votes
2answers
1k views

How to compute the inverse CDF of HyperbolicDistribution properly?

Fixed in version 9. I want to compute the CDF and inverse CDF of the hyperbolic distribution: ...
12
votes
1answer
206 views

NExpectation behaves oddly with EmpiricalDistribution

Note: this is fixed in version 9. My question concerns the usage of NExpectation and Expectation and why I see the behavior I ...
8
votes
1answer
538 views

Random variables with transformed discrete distributions cannot be applied to Probability[] function?

I have two discrete uniform distributions over same support: Dx = DiscreteUniformDistribution[{-8, 8}]; Dy = DiscreteUniformDistribution[{-8, 8}]; I use ...