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Questions tagged [beta-distribution]

A two-parameter family of univariate distributions defined on the interval [0,1].

The "Beta distribution" is a two-parameter family of univariate distributions defined on the interval [0,1]. The probability density function of the distribution is:

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with positive parameters α and β.

A common use of the distribution is in Bayesian statistics as a prior for the Binomial distribution. The Beta distribution is also used in beta regression, which can be useful when the dependent variable has a floor or ceiling effect or is bounded.

In scientific software for statistical computing and graphics, function dbeta computes density of a beta distribution, pbeta computes CDF of a beta distribution, qbeta computes quantile of beta distribution and rbeta draw samples from a beta distribution.

Tag usage

Questions on should be about implementation and programming problems, not about the statistical or theoretical properties of the technique. Consider whether your question might be better suited to Cross Validated, the StackExchange site for statistics, machine learning and data analysis.

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How to evaluate beta distribution only once in python?

In a simulation that I am running I have to draw many many values from the same beta distribution. Currently, I am using import random ... for i in range(n_Aa): h = random.betavariate(a, b) // With some values for 'a' and 'b' ... This code,…
Reza Rohani
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how to create a random loss sample in r using if function

I am working currently on generating some random data for a school project. I have created a variable in R using a binomial distribution to determine if an observation had a loss yes=1 or not=0. Afterwards I am trying to generate the loss amount…
Alex_T_86
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Scale dataset in R

I have 528 observed of temperature data the range value of data (2-53). I was to scaled the data to make it range between 0 and 1 to fit beta distribution to find weather the beta distribution is fit the data or not. Can anyone tell me please how…
Salam Abbas
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represent the frequency line in a histagram using freq=TRUE

I have the following piece of code in R: w=rbeta(365,1,3,ncp=0) hist(10*w,breaks=25,freq=TRUE,xlim=c(0,10), ylim=c(0,60)) h=seq(0,1,0.05) So far so good. What I want to do now is to add a line representing the beta function having parameters…
Pezze
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domain using plot function in r

I start saying that i am really new to R, hence this could be a very simple problem. I want to do a monte carlo simulation with a beta distribution. The case is that i have a website, which will receive from 0 to 10 visualisations each day for one…
Pezze
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How to do MCMC simulation using Metropolis hasting algorithm in Matlab?

I am trying to simulate a distribution for parameter theta f= theta ^(z_f+n+alpha-1)*(1-theta)^(n+1-z_f-k+ beta-1), where all the parameter except for theta is know. I am using Metro polish hasting algorithm to do the MCMC simulation . My proposal…
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Generation of binary data using Beta distribution in R

I am new user in R. In my work, I have to generate binary data(0 or 1) using beta distribution (rbeta command). I have to create a matrix of such data. In some of the columns I want to have more zeros than ones or ones more than zeros. And this…
kalyani
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inverse cumulative probability of beta distribution in php

I am trying to find a function with the functionality equivalent to inverse beta CDF. I searched for the function but i could not find anything which can do this task. Is there any library function which can do this? Or is there any way to achieve…
Karthik
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R - Derivatives of the inverse of the regularized incomplete beta function w.r.t. shape parameters

The regularized incomplete beta function I(x,a,b) is the CDF for a random variable distributed Beta(a,b). I have a problem that requires computing the partial derivatives of its inverse (the quantile function) w.r.t. parameters a and b. Do you know…
Trang Q. Nguyen
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What is the equation for beta1 prime, beta2 prime and the normalizing constant in the following beta distribution?

Can someone tell me what the separate equations for beta1 prime (B_1) and beta2 prime (B_2) and the normalizing constant are in this beta distribution? How does one go about computing them? θ ^(k+β_1 -1) (1 − θ)(n−k+β_2 −1)/B(k+β_1, n-k +…
JoeBloggs
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