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2 votes
Accepted

Does t-SNE have to result in clear clusters / structures?

No, T-SNE does not have to result in clear clusters. It is a low dimension visualization of high dimension data. So, if you data points are well clustered in low dimension, it means that they can be ...
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2 votes

Correlations with NA or with Zeros?

Normally, statistical softwares exclude NAs from any estimation procedure. That's not the case if you change an NA with 0. That may create a lot of distortions. Indeed, the reasons of the NAs are ...
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2 votes

Correlations with NA or with Zeros?

Imputing missing values with 0 is definitely wrong, keeping NAs as NAs is certainly less wrong. But more correctly you should figure out why you have missing values in the first place, as the reason ...
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0 votes
Accepted

Multiple conda enviroments in (R) functions using reticulate

It seems that this is not possible to do at the moment. Only one python conda env can be active, and most likely needs to be set up in .Rprofile.
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