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| &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/5ca40c36-3c18-423d-9bff-d23e2294dc6d |
| Suppose I want an external language cell in my Notebook. I press > at the beginning of the line. I get a little Python dingbat on the left for the Python code I might want to enter. But what if I don't want to use Python? I want to use R or Julia or... |
| Suppose one has a list of vectors v1, v2, ... vn. One wants to construct a new vector w such that the correlation between the new vector w and v1 is r1, the correlation between w and v2 is r2, ... and the correlation between the new vector w and vn... |
| This problem is a problem about FeatureExtraction that arose in the course of training a neural network where the data contains a mixture of nominal and numeric variables. The problem in a nutshell is trying to find a map between the parts of the... |
| I tried using RLink today on a new silicon Mac. The silicon (ARM) version of R is installed and works. When I run InstallR[] I get the following cryptic error message. "InstallR::bndlunsupp: RLink does not support bundled R runtime for the current... |
| Anyone have ideas on the fastest way of getting the dimensions (number of coordinates) out of any Wolfram Language distribution. For some types (CategoricalDistributions) it is easy. And if a RandomVariate can be generated, it is easy too. But for... |
| I would like for pedagogic purposes to show how Ridge Regression and LASSO (and presumably other forms of regularized regression such as ElasticNet) can be emulated using a neural network in the same way that one can emulate conventional regression. ... |
| The new ParallelAxisPlot in version 12.2 is lovely. And I generally enjoy the ability to mouseover the plot and see the lines it generates become highlighted. Except ... sometimes I don't. I find that if you have a ParallelAxisPlot inside a... |
| There is something known as a MahalanobisDistance. I can write a Mathematica function to calculate it for two vectors u and v with respect to some data. Here's a function that implements it. MahalanobisDistance[data_?MatrixQ,u_,v_]:=... |
| [![enter image description here][1]][2] There are now various disputes about whether Joe Biden or Donald Trump should receive the electoral votes in various states. Courts, legislatures and state election officials will be wrestling with various... |