# Questions tagged [mahalanobis]

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### Mahalanobis Distance question in r

I have a question when calculating Mahalanobis Distance using R. For the Mahalanobis distance function below: mahalanobis(x, center, cov, inverted = FALSE, ...) The center in the function above should ...
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### Calculating Mahalanobis distance using SPSS

I am a doctoral student who is still learning programming and statistics. I am really struggling with a problem and need help from this community help in calculating a new variable using Mahalanobis ...
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### Alternative way of solving Mahalanobis distance

Mahalanobis distance is given by: $(x-\mu)^T \Sigma^{-1}(x-\mu)$ Apparently the solution to the above formula is equivalent to: $Trace(\Sigma^{-1} (x-\mu)(x-\mu)^T)$ How can you prove that the two are ...
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### assumptions to compute mahalanobis distance

Which are the assumptions to compute the Mahalanobis distance between two groups? Do all the variables of the two groups be normal distributed?