All Questions
62 questions
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0
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92
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116
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3
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91
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How to restrict FindDistribution to real-valued distributions
The following seems buggy to me, but perhaps I'm confused about something. Or maybe there's a workaround that makes it moot?
First, I ask Mathematica to find a distribution that describes a dataset ...
- 696
5
votes
2
answers
735
views
Fit function to histogram
I have a list:
histx={-56.6335, -57.2327, -57.8607, -57.9682, -57.0061, -57.1872,-56.9209, -56.1284,...};
I managed to create the histogram that I wanted to:
But ...
- 401
2
votes
2
answers
249
views
Can the CopulaDistributions be fitted?
This is an immediate follow-up to DoAny--which I did consider editing, clarifying and correcting in some respects.
But perhaps here I can put the immediate question at hand more directly (the emphasis ...
- 2,385
1
vote
3
answers
333
views
Do any of the Mathematica CopulaDistributions (or others) fit well this sampled bivariate copula with uniform marginals over [0,1]?
I'm currently developing a data set that consists of two $50 \times 50$ matrices, which I designate as q1 and Q1. I strongly believe (bordering on formal proof [cf. Corollary 1 in marginalinvariance]) ...
- 2,385
4
votes
2
answers
499
views
Polynomial fitting to obtain the growth rate
We -- my friend -- had asked a question here, which was not completely related to Mathematica, however, in a hope that someone familiar with the topic could help. There are still some aspects which we ...
user82988
1
vote
2
answers
301
views
Any suggestions for improving my fitting?
This is not a completely Mathematica question, but I hope people who are familiar both with Mathematica and statistics could help me on this.
I have a set of data as
...
0
votes
0
answers
78
views
How to find the appropriate fit?
Imagine we are given this set of data:
data = {{0, 1}, {1, 0}, {3, 2}, {5, 4}, {6, 4}, {7, 5}};
We fit the data with:
...
user80433
5
votes
0
answers
403
views
Histogram (automatic binning)
There are different methods for choosing widths of bins for a histogram, like Freedman-Diaconis rule. In Mathematica, without choosing a specific method, with the command ...
user79703
2
votes
2
answers
246
views
1
vote
2
answers
247
views
Finding a Distribution
I'm trying to find the optical distribution for the following data
https://drive.google.com/file/d/1z_cSu7w8tlz_uEYHr8Y0fFBTwLNo4jtp/view?usp=sharing
As there are a lot of points, the only way to ...
- 585
2
votes
2
answers
141
views
Can I impose some a priori constraints on a distribution found by SmoothKernelDistribution?
I use SmoothKernelDistribution (with no options and a single argument — a list of values) to get an approximate reconstruction of a continuous distribution based on ...
- 7,333
2
votes
1
answer
224
views
Does FindDistributionParameters have any inbuilt parameter error estimation available?
FindDistributionParameters is super useful for extracting parameters and using them for other things, like defining random variables.
However I can't find any ...
- 2,530
0
votes
1
answer
205
views
How to fit data with superposition of CDFs?
With the help of @JimB, I could fit some experimental data with a CDF using NonLinearFitModel. The set of data is the following:
...
0
votes
0
answers
90
views
Can Mathematica be used to fit these functions related to the Riemann Xi function $\xi(s)$ to a known probability distribution type?
This question is related to my Math Stack Exchange question at the following link:
Question on Probability Distributions Related to the Riemann Xi Function $\xi(s)$
The definitions below are for $x&...
- 238
0
votes
2
answers
204
views
Partitioning Mixture Distribution Dataset into constituent Distributions
Suppose I have a dataset that is derived from a random sampling from a mixture distribution
...
- 427
0
votes
1
answer
465
views
Fit to Binomial Function
I have the following data, and need to fit a binomial distribution to this data. I have already done so for a gaussian fit (this is the example code I have below), but I am having trouble using a ...
- 3
1
vote
1
answer
235
views
Using EstimatedDistribution with custom circular ProbabilityDistribution
Basic Idea
I'm attempting to estimate the distribution of a set of angle measurements. I have a custom probability distribution that I believe explains the measurements accurately and am attempting ...
- 2,158
0
votes
0
answers
153
views
Mixture distribution fitting containing a uniform distribution
I have a dataset that is clearly the mixture of 3 known distributions which can be generated as follows:
...
- 427
1
vote
1
answer
228
views
Mean and Distribution of Data
I am having a difficult time fitting my data to a distribution and finding the mean of the distribution. The data set is large, but here is a small sample
...
- 180
0
votes
2
answers
132
views
Confusion on using LognormalDistribution in Mathematica
I would like to fit a LogNormalDistribution[μ,σ] based on some data that I have. Roughly speaking, would I need to take the Log ...
- 463
1
vote
1
answer
226
views
Plotting confidence interval from P values (from DistributionFitTest) for 2 parameters
I have a data set I'd like to adjust with 2 parameters, then compare that to another set of data. By using NMaximixe with ...
- 185
0
votes
1
answer
129
views
FindMaximum for LogLikelihood fails for multiple parameters
I need to fit a non-analytic data set to another data set using at least 2 parameters: shift and scale. For my 2 data sets (data1 and ...
- 185
1
vote
1
answer
109
views
Varying values of parameters and sample size won't work
1.Hello , I have customized a distribution, and then trying to estimate the parameters for smaller values of sample size say n=10,30,40,50 and 60.It runs for n=10 and n=1000 and then it does ...
- 107
1
vote
1
answer
109
views
Force symbolic usage in PDF or distribution
I want to create a custom distribution based on a SmoothKernelDistribution or KernelMixtureDistribution as so:
...
- 185
1
vote
0
answers
70
views
Finding parameters of custom distribution with no analytical function
I need to shift one distribution to another using a simple positional correction parameter. For illustrative purposes, I will create a "double hump" or "twin peaks" distribution here, but my actual ...
- 185
1
vote
3
answers
3k
views
2
votes
1
answer
209
views
How to exclude MixtureDistribution from FindDistribution
is there a way to exclude MixtureDistribution from the set of fitted distributions when using FindDistribution?
I expected ...
- 123
0
votes
0
answers
467
views
How do I calculate a P-Value from 2 custom data sets?
I have 2 custom data sets:
data1 = Import["https://pastebin.com/raw/KHkmEfQB", "List"];
data2 = Import["https://pastebin.com/raw/Hm3mhczi", "List"];
These are ...
- 185
2
votes
1
answer
783
views
Fitting data to an empirical distribution, finding best fit
So I have a non-standard (non-normal, non-Gaussian, non-exponential, etc...) distribution, so I created a distribution empirically:
...
- 185
1
vote
1
answer
108
views
Create non-standard PDF from data, then doing a likelihood fit
Let's say I have some set of data which is not a "normal" distribution of data, meaning it does not hold a Gaussian, exponential, or other neat formulaic look. Here's an example of data where the PDF ...
- 185
2
votes
1
answer
114
views
FindDistributionParameters for a ParameterMixtureDistribution
Let's say I define a simple hierarchical model as follows (I don't actually particularly care about the distributions chosen):
...
- 1,138
1
vote
1
answer
302
views
Find the parameter estimates for a Weibull Distribution
I am a new member of this community and I try to learn Mathematica Software.
At moment I try to find the parameter of a Weibull distribution, but I cannot solve the problem.
This is the code and the ...
- 53
10
votes
2
answers
1k
views
Finding a distribution to fit truncated data
I have certain experimental data with the following PDF.
As you may note the data does not take values lower than 0.
Using FindDistribution I get the following ...
- 1,032
1
vote
1
answer
160
views
FindDistributionParameter slow with user defined Distribution
I am trying to define my own probability distributions in order to fit data using Maximum Likelyhood. To test my distributions, I have produce a set of data Normally distributed using
...
- 11
1
vote
3
answers
2k
views
How to fit a Distribution to data that already looks like a distribution?
I have a set of data that is already ordered as a distribution. Here is a picture worth 999 words:
I tried FindDistributionParameters, and ...
- 273
4
votes
1
answer
652
views
package for calculating exponent of power law distribution
There are some packages to fitting power law to empirical date in "R", "matlab", "python" Here with maximum likelihood method As it said here.
Does it exist similar package in Mathematica?
- 367
6
votes
2
answers
934
views
How to measure accuracy of prediction distribution?
I have been trying to come op with a way to test if my dataset follows a Poisson distribution. Normally one would use the DistributionFitTest function, but here is ...
- 841
3
votes
0
answers
171
views
PearsonChiSquareTest for count/frequency data?
I read with interest a previous question on the PearsonChiSquareTest from a few years ago, and one answer was very helpful:
Performing a chi-square goodness of fit ...
- 43
4
votes
4
answers
679
views
Fitting Coxian distribution to some data
I'm trying to fit a transformed (actually shifted to the right) Coxian distribution to some data ( if needed an example set is here Sim data ).
I've tried a number of ways for this:
...
- 465
5
votes
2
answers
791
views
Estimate parameters of a derived distribution
I would like to estimate the parameters of a derived distribution fSurvivalGompertzNoiseDist below.
This distribution represents simulations from a probability ...
- 3,167
1
vote
1
answer
983
views
Fitting data to an Normal Inverse Gaussian distribution
I am using data which I suspect is distributed according to the Normal Inverse Gaussian distribution (NIG). The literature says that the 4 parameters of the NIG distribution can be estimated from the ...
- 193
1
vote
1
answer
348
views
Boundary parameter in Beta Distribution
I use EasyFit to find the probability distribution of my data. It turns out the data follows BetaDistribution with 0.54022,0.70601 shape parameters and
1.33,6.83 continuous boundary parameters
I am ...
- 38
4
votes
1
answer
150
views
Proper command to fit a distribution with data incomplete in a known way
Here is my scenario: got some data that I have to fit to a specific parametric family of probability distributions (cannot be changed).
Data consist of several bunches of integers between, say, 0 and ...
- 2,182
2
votes
3
answers
556
views
Fit dataset with customized discontinuous distribution
I have the following parametric CDF:
F[x_, λ_, β_, γ_] = Piecewise[{
{0, x < 0},
{1 - (1 - β) E^(-x λ), 0 <= x < γ },
{1, x >= γ}
}];
...
- 23
4
votes
0
answers
426
views
Goodness of Fit of Copula Distribution
I am trying to find out goodness of fit of copula distribution, but Mathematica 10 gives me the same answer for each copula type. e.g
...
- 627
2
votes
4
answers
2k
views
Fitting and plotting Weibull distribution
How can I find the best fitted 2-parameter Weibull's distribution (PDF) to describe my data? How can i plot my data and estimated distribution all in one graph?
How can I show/compare results of ...
- 21
3
votes
1
answer
318
views
P-Values are inconsistent when using DistributionFitTest repeatedly
I am attempting to become more familiar with the DistributionFitTest, specifically the distributions it yields and their fittedness. What I have found is that when I generate random data, fit it, and ...
4
votes
2
answers
462
views
FindDistributionParameters gives an error for a mixture of user defined sinh-arcsinh distributions
I have some data (1593 values). I first binned it using the Knuth rule and fitted a function that is a linear combination of two sinh-arcsinh functions. I then ...
- 24.3k