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Questions tagged [scipy.stats]

297 questions
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Python Mahalanobis distance multidimensional z-score

I want a performance score, like a z-score, for two-dimensional data around a known fixed point. I think I want the Mahalanobis distance now, rather than z-scores in each direction. But I don't have two vectors, I have a 2 x N array of positions of…
Lizardinablizzard
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Is there a Python function to make a kernel density estimation (KDE) over a CDF?

I have a simple CDF (cumulative distribution function) that I want to estimate using a KDE (kernel density estimation) in order to smooth out the 'steppy' nature of the CDF. The dataset is quite small (40 datapoints), so the steps are quite obvious…
tudor-suciu
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Write a function that performs multiple student t-test for a list of DataFrames

I have this DataFrame: print(TempvsDType) CurrentThermostatTemp DwellingType Bungalow 0.0 Bungalow 22.0 Bungalow 22.0 Bungalow …
GUILLE DOMINGUEZ
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Kurtosis remains constant over different shaped normal distributions?

I want to explore the normal distribution with the same mean, but changing std. I expect that the Kurtosis will change with the std, but in my results the Kurtosis stays constant? What is the issue here? At first I generated some normal distribution…
Ormetrom2354
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Fitting histogram to chi2 with unknown degrees of freedom

Please could someone verify that the first parameter in a scipy.stats.chi2.fit for some data is actually the number of degrees of freedom df? Here is an example of what I'm checking x=np.random.rand(1000) y=stats.chi2.pdf(x,df=1) z=np.log10(y) #…
MKF
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Fitting custom distribution scipy.stats gives overflow

I am trying to fit a generalised error distribution to some data that I have. The form of the distribution is given as I have tried the following implementation import numpy as np import scipy.stats as st from scipy.special import gamma class…
mch56
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Scipy Compute Mann Whitney U along Multiple Slices

Given the following arrays: import numpy as np from scipy.stats import mannwhitneyu s1 = np.array([[1,2,3,4,5,6,7,8,0,10],[10,9,8,7,6,5,4,3,2,1]]) s2 = np.array([[1,11,3,7,5,6,7,8,0,10],[10,9,8,7,6,15,4,13,2,1]]) I want to run the…
Dance Party
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Looking for efficient way to get pearsonr between two pandas columns

I am trying to find a way to get the person correlation and p-value between two columns in a dataframe when a third column meets certain conditions. df…
jhaeckl
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How to find percentage of values within given range in python?

Problem statement - Variable X has a mean of 15 and a standard deviation of 2. What is the minimum percentage of X values that lie between 8 and 17? I know about 68-95-99.7 empirical rule. From Google I found that percentage of values within 1.5…
MVKXXX
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equivalent of "ksdensity" MATLAB built-in function in Python

I need the python equivalent code for the below MATLAB code: [f,xi] = ksdensity(data,'Support','positive','Function','cdf'); I find the below python code, but I don't know how I can provide its cdf. I appreciate it if you could guide me. from scipy…
Mohammad
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Finding probability of mean falling within a range - Python, matplotlib

I am new to matplotlib and statistics. Trying to learn through the below example and need some help in terms of understanding and solution. I have added a bar chart image below. I have sample data for four years 1992, 1993, 1994, and 1995. I have…
Vikrant
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ValueError Issue with implementation of plotting uniform distribution

so i am trying to plot a uniform distribution using scipy.stats, but am running into this error, to do with shape transformation, could someone please tell me why this is happening / how my code should look, thank you. Full Code and traceback…
user12482885
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Vectorized KL divergence calculation between all pairs of rows of a matrix

I would like to find out the KL divergence between all pairs of rows of a matrix. To explain, let's assume there is a matrix V of shape N x K. Now I want to create a matrix L of dimension N x N, where each element L[i,j] = KL(V[i,:],V[j,:]). So far…
Hirak Sarkar
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Different methods to test normality result in different outputs for the same data

I have data set from the internet and I wanted to try different normal tests for different columns. I find it funny, that different normality tests give me different results. Not just a couple of decimals different but COMPLETELY different…
Noob Programmer
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Dynamically create scipy.stats distribution from methods of another class

I have created a class which represents a statistical simulation. One aspect of that is a distribution of p-values, and the class contains methods characterizing that distribution: class Simulation: ... def pdf_p(self, p): ... …
A. Donda
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