Is there a default seed? I copied the Python code from seed_test.py and removed the set_seed calls. The test passed thousands of times despite no set_seed calls being made. Is this expected? If so, can we document this? Is there an explicit default seed?

Just as a sanity check, I modified the calls to set the seed to two distinct values and it failed every time, as expected.

The reason I'm a

Describe the bug

If partition tag set empty string, the message returned should be

  reason: "Invalid partition tag:  Partition tag should not be empty."

Search failed:
status {
  error_code: ILLEGAL_ARGUMENT
  reason: "Invalid partition tag: . Partition tag should not be empty."
}

Steps/Code to reproduce behavior

Expected behavior

**Env

This is a good first issue and will help new contributors to get familiar with the codebase. Also This issue doesn't aim to add all Metrics to mlpack since each metric would have to be maintained, this aims to add metrics that either I find essential (or have used a couple of time) or those metrics which are very common.
List of metrics that can be added include:

1. IoU and meanIoU

Hi,
I suggest you update Documentation page with a better explanation regarding windows.
I do not know how things are going with installation through Python environment, but direct compilation of library is not possible not because you do not provide Visual Studio project or something but because FHHT is mostly written in inline assembler code that is supported by GCC/Clang compilers only.

N2 does not have code formatting check process before pushing the code.
We need to add the process.

e.g coala