python multivariate normal pdf 3d plot

Publicado em: 26 Novembro 2023
no canal de: CodeWave
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In this tutorial, we will explore how to create a 3D plot of the multivariate normal probability density function (PDF) using Python. We will use the numpy and matplotlib libraries to generate data and create the 3D plot.
Make sure you have the following libraries installed. You can install them using pip if you haven't already:
The multivariate normal distribution describes the distribution of a vector of correlated random variables. The PDF of a multivariate normal distribution is defined as:
f(x;μ,Σ)=
(2π)
d/2
∣Σ∣
1/2
1
exp(−
2
1
(x−μ)
T
Σ
−1
(x−μ))
Where:
Let's generate multivariate normal data using the numpy library:
In this example, we generated 1000 samples from a 2-dimensional multivariate normal distribution with a specified mean and covariance matrix.
Now, let's create a 3D plot of the multivariate normal PDF using the matplotlib library:
This code creates a 3D surface plot of the multivariate normal PDF using the computed values from the meshgrid. Adjust the mean, covariance matrix, and other parameters as needed for your specific use case.
Feel free to experiment with different mean vectors and covariance matrices to see how they affect the shape of the multivariate normal distribution.
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