All Questions
Tagged with distributions bugs
27 questions
2
votes
1
answer
135
views
Mean not working with Gamma convolution distribution
Using v 13.01 or 13.1: bug in integrate, see accepted answer below.
First off, the distribution ...
- 801
5
votes
1
answer
128
views
Mean of TransformedDistribution returns wrong result
I want to compute the mean of this transformed distribution $10^{(25+5x+y)/5}$, where $x$ and $y$ are independent normal random variables.
Here is my code
...
- 51
6
votes
2
answers
253
views
Why is the conditional probability not working for `CategoricalDistribution`?
Bug introduced in 12.1 and fixed in 12.3
Consider the following simple example for demonstration:
...
- 9,751
2
votes
0
answers
151
views
Is Mathematica computing the conditional expectation correctly?
Given a simple case of say 2 independent trials each with probability of success 1/3. Consider a random variable that is gives the 3 times the total successes.
We can define this random variable in ...
- 9,751
19
votes
1
answer
289
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:
...
- 26k
3
votes
1
answer
219
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
...
- 842
6
votes
0
answers
264
views
Does DegreeGraphDistribution sample uniformly?
Bug introduced in 10.0 or earlier and persisting through 12.1
The first symptom (histogram below) is gone in 12.0. The second (fraction of connected graphs) persists, showing that the sampling is ...
- 236k
7
votes
1
answer
164
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 ...
- 43.2k
5
votes
1
answer
151
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 <...
- 43.2k
6
votes
0
answers
73
views
33
votes
2
answers
1k
views
Huge bug involving MultinormalDistribution?
Bug introduced in 8.0 and fixed in 11.1
I found a strange behavior regarding the CDF of the bivariate Normal distribution
...
- 1,005
7
votes
0
answers
80
views
10
votes
1
answer
323
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 ...
- 13.6k
7
votes
3
answers
148
views
4
votes
1
answer
274
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 }}}...
- 133
10
votes
1
answer
163
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.
...
- 6,117
10
votes
2
answers
200
views
Possible bug in VonMisesDistribution?
Bug introduced in 10.2 or earlier and fixed in 10.3
Observe:
...
- 26k
5
votes
1
answer
199
views
5
votes
1
answer
138
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:
...
- 701
9
votes
2
answers
176
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:
...
- 193
4
votes
1
answer
182
views
Example from Mathematica documentation (ExtremeValueDistribution) seems to be evaluating "forever"
Bug introduced in 9.0.1 or earlier and persisting through 11.0.1 or later
I am referring to this example at the reference page for the extreme value distribution: http://reference.wolfram.com/...
- 1,605
8
votes
1
answer
196
views
AndersonDarlingTest and DistributionFitTest Leaking Memory
I believe AndersonDarlingTest and probably all other tests are keeping a copy of data somewhere and not freeing it:
...
- 13.8k
11
votes
1
answer
421
views
How does LocationTest choose its "AutomaticTest"?
Is there a way of determining how LocationTest chooses its "AutomaticTest"?
Sometimes it's clear from the ...
- 6,086
6
votes
4
answers
260
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 ...
- 163
8
votes
1
answer
314
views
Expectation of CauchyDistribution
Bug introduced in 8.0 or earlier and persisting through 13.2.0
I've noticed this strange behavior and I'm wondering if it's a bug.
I define a Cauchy distribution:
...
- 36.4k
16
votes
1
answer
470
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}]
...
- 8,762
16
votes
2
answers
2k
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:
...
- 1,503