Add percentile function for p-quantile

[lulunac27a]

Description

Add percentile function for datasets with p-quantile based from an array of numbers. percentile value is 0 to 100.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

• If this is a new feature, did you add files to the examples directory to demonstrate the feature?
• If this is a new feature, did you add documentation to the docs directory for the feature?

[lazyguru]

Hi @lulunac27a, could you please add/update test files in the example vault that both demonstrates this function being used but also works as a way to test that it is working? You can either add a new file or update https://github.com/pyrochlore/obsidian-tracker/blob/master/examples/TestExpression.md to include usage of the new function and then update a few of the files in the diary directory to use as the dataset

[lulunac27a]

I added the test expressions.

[lazyguru]

This won't work since expression functions can only accept dataset and renderInfo. I checked locally and it won't even compile when I run npm run dev. I would suggest instead looking at the RenderInfo class and adding a new field there to hold percentage. Then your dataView code would look something like:

searchType: dvField
searchTarget: dataviewTarget
folder: /diary
endDate: 2021-01-03
percentage: 0.6
summary:
    template: '60-percentile value: {{percentage(dataset(0))::.1f}} <-- should be 29.6'

[lazyguru]

After you have made changes, I strongly encourage you to run npm run dev and then open up the example folder in Obsidian so you can verify it works (this is what I do with every new feature submitted)