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6
votes
3answers
10k views

How to use a 3×3 covariance matrix to plot an error ellipsoid?

I have a 3×3 error covariance in Mathematica, but I don't know how to use it for plotting the error ellipsoid. It would be great if you can show me how I can do that for the below covariance matrix: <...
2
votes
1answer
246 views

Creating a contingency table

I need help in creating a function for a contingency table... I imagined to create it like this... ...
11
votes
1answer
447 views

How can I reproduce the result of PrincipalComponents

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4
votes
1answer
2k views

stationary distribution of a transition matrix

How can I solve the stationary distribution of a finite Markov Chain? In other words, how can I estimate the eigenvectors of a transition matrix?
2
votes
1answer
86 views

Compute the potential of confusion between two matrices

I have a problem. Any help will be appreciated. In order to calculate the accuracy, sensitivity, sensibility and F1 score between diseases and their symptoms, I have two matrices with a different ...
2
votes
1answer
154 views

Extracting Imported Information

What I want to do is to compare the relationship between the consumption of say beer and wine using scatter plots where each point designates the particular country (preferably named). I have tried to ...