umap

Applying [] to a pointer does pointer arithmetic. You want to apply the [] to the pointed at object, so you need to explicitly dereference the pointer:

I'm unfamiliar with the Top2Vec class you're using.

However, that error would be expected if code that was written to use certain properties/methods in gensim-3.8.3 hasn't been adapted for the recently-released gensim-4.0.0, which has removed and renamed some functions for consistency.

Specifically, the vectors_docs property has been removed. (Also, the vectors_docs_norms property mentioned a couple lines above in an unexecuted branch.)

The small changes required in the calling code are covered in the Migrating from Gensim 3.x to 4 wiki page, which I've just updated to ensure it mentions vectors_docs specifically.

If you don't feel comfortable appkying this & any other changes to your Top2Vec code yourself, you may just want to report the issue to its author/maintainer, and as a temporary workaround, explicitly install the older Gensim for now. With the usual pip-based install, you could specify an older version with:

flip the coordinates lines

For clarity and ease of testing, let's define a helper function:

you can try install with pip install -c numba numba=0.51.2.1rc1 if it doesn't work for you alternativly install RUN pip install llvmlite --ignore installed before pip install numba. HAVE A GOOD DAY:)

try using the --update and --force-reinstall options of pip, or:

pip install --update --force-reinstall git+git://github.com/lcminnes/umap@master

I figured out this can be done using factoextra package. But it would be nice if anyone finds the way to do it with the regular plot() function though

A pattern rule is a template that tells make how to build a target. It doesn't provide make with a list of targets to build: it's just a recipe for building targets. So this pattern rule:

Based on feedback from a helpful user, I eventually arrived at a less hack'y solution. Unfortunately, the discussion went AWOL because of an unhelpful user, who responded with pip install -U numpy, waited for me to figure it out, edited their answer and requested I accept it. Upon being denied, the answer and comment thread vanished. I don't even remember your name, helpful user, so I can't credit you for the tip.

Apparently ReadTheDocs uses an old pip, and requiring pip>=19.0 makes scikit-learn not install from source. As such, I added that line to docs/requirements.txt, which I had previously set up to be a ReadTheDocs requirement file. This resulted in some progress - now rather than scikit-learn complaining about numpy, it was numba. Still, some synapses connected, and I just handled any dependency problems that arose via docs/requirements.txt, the final contents of which are:

Regardless of wether this is something you should be doing or not (the comments under your question are covering this already), it's still worth answering your question as is.

The [] operator of map types is a veritable swiss army knife. You can do a lot of things with it.

• You can assign a value.
• You can lookup the value.
• You can lookup a value even if it doesn't exist yet.

Because of this, using that operator imposes some requirements for whatever type is stored in the map. In this specific case, you are running into the requirement that it has to be value-initializable, which references cannot be.

This applies to regular references as well by the way, not just function references.

So the answer is: You can store references in a map as much as you like as long as you don't use any function of the map that requires the reference to do something it's not allowed to.

In this case, you can use umap.at(0)(10.1);. One of the big differences between [] and at() is that if the key is not set yet, at() will throw an exception instead of creating a value-initialized value.