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Questions tagged [scipy.stats]

297 questions
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How does scipy.stats.binned_statistic map the sequence of bin edges to the data on which the statistic will be computed?

Take the following example from the documentation: rng = np.random.default_rng(seed=3576) windspeed = 8 * rng.random(500) boatspeed = .3 * windspeed**.5 + .2 * rng.random(500) bin_means, bin_edges, binnumber = stats.binned_statistic(windspeed, …
neverreally
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Not sure Kolmogorov Smirnov Test is working as it should

changed the code with the Gaussian args considering Sam Masons comment. The results are still wrong, since I know from QQ-plots the data is probably a decent Gaussian. I will try to post my updated code and attach the data file too. Perhaps it's…
NotAnotherName
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Obtaining percentages from a 2d density plot

I've got a 2d kde plot with contours overlying a hexbin plot. I would like to set the contours and have them show as percentages. An example would be having the contours aligned with the 90% probability or 50% probability. Is there a simple method…
Scott
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Calculating p-value with Python. One-tailed or two-tailed?

I'm using this function to calculate the p-value of an experiment I'm running. I'm not sure if it's one-tailed or two-tailed. How can I infer this from the code? Thanks from scipy import stats def get_pvalue(con_conv, test_conv, con_size,…
cloudycider
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How to create an array in Pyspark with normal distribution with scipy.stats with UDF (or any other way)?

I currently working on migrate Python scripts to PySpark, I have this Python script that works fine: ### PYTHON import pandas as pd import scipy.stats as st def fnNormalDistribution(mean,std, n): box = list(eval('st.norm')(*[mean,std]).rvs(n)) …
ImNotAPanda
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How to get the Sigma of a Rayleigh distribution in python scipy.stats

Calling rayleigh_args = stats.rayleigh.fit(num_list) Returns a tuple of 2 values e.g. (-320.34, 360.77). Where I can use it to get the CDF or PDF of the distribution for a given value. I can't find what each of those values represents. In addition,…
George T
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Problem with choice of distribution and right stat test

I have specific data about troubles on a plant. To analyze it, I decided to use fitter and find best distribution that fits my data. After using kstest for the best fit, I saw this strange result: KstestResult(statistic=0.9866071428571429,…
S L
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Can one create a distribution characterizing the multiplication of two distributions in Python?

I have two distributions and I would like to know the properties of the multiplication of these distributions. For example, if I had the distribution of properties velocity and time, I want the characteristics of the probability distribution of…
ramzeek
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Cannot import name 'threshold' from scipy.stats

I am trying to use function threshold from scipy package. from scipy.stats import threshold I_t=threshold(I, threshmin=2, threshmax=400, newval=-1) # I is an array containing image data However, i am getting an error message saying cannot import…
vashista
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excel result and stats test are not the same for p-value

I'm trying to get the same result from this excel table, indicating that there's a link between the wight and the result (after going to the gym) The result on the excel shows the p-value as 1.28% (for 2 tails) and 0.64% for 1 tail. Given weight =…
ProcolHarum
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Curve fitting scipy.stats.multivariate_normal

I am trying to curve fit a 2D multivariate normal distribution to an image. The approach here works, however I want to parametrize the result with a covariance matrix, like in scipy.stats.multivariate_normal. Here is my code: def mvnorm(data_tuple,…
gopromaster
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the mean and standard deviation aren't the same as those of the input data i provided after sampling

I have a log-normal mean and a standard deviation. after i converted them to the underlying normal distribution's parameters mu and sigma, I sampled from the log-normal distribution however when i take the mean and standard deviation of this…
codebreaker12
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Custom pdf with parameters and support with scipy

I want to build a custom pdf using the rv_continuous class; such a pdf should depend on a couple of parameters, l1, l2, l3 in the example below. This is my attempt: k=1 class estimated_pdf(scipy.stats.rv_continuous): def _get_support(self, l1,…
Emanuele Giordano
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SciPy error: RuntimeWarning: overflow encountered in _beta_ppf

My SciPy version is 1.7.3 and I'm running on an Apple M1 chip (not sure if it's relevant). My Python version is 3.9.11, installed via Annaconda. I get the error message…
ramund
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How to generate random number of lognormal distribution using scipy.stats lognorm with mean and standard deviation already known

I want to generate a random number of lognormal distribution using the scipy.stats lognorm. I have mean and standard deviation already give. from scipy.stats import lognorm sigma = 5 mean = 0 randomNumber = lognorm.rvs(sigma,…
Umair Mayo
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