arquero
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Query processing and transformation of array-backed data tables.
Currently if you do: ```js table .select('col1', 'col2', 'col3') .print() ``` You'll see your table in the console. But you can't continue chaining operations. This would be useful to check...
(Please excuse the PR re-lodge) As far as I can tell, the Options type is incapable of using params, so I've elected not to pass opt to astOptions (or astTableRef...
I am having trouble using `op.first_value` from `arquero`. Below is an example that demonstrates the issue. When using, for example, `.rollup({sum: op.sum('value')})` instead of `.rollup({first_value: op.first_value('value')})`, it works fine so...
Like [na.approx](https://www.rdocumentation.org/packages/zoo/versions/1.8-10/topics/na.approx) from zoo package in R, it would be great to be able the same operation with arquero. I can't figure it out to do it with arquero. Impute...
Hi, with `pyarrow` v7.0.0: ```python import seaborn as sns import pyarrow as arrow iris = sns.load_dataset("iris") pf.write_feather(iris, 'iris.feather') ``` The resultant file is then loaded into `arquero` in an [Observable...
Hi, I'm really impressed by Arquero and the use of the Arrow format. I'm trying to use ClickHouse database (which is really fast) with Arquero using Arrow format, since ClickHouse...
## Problem The Arquero build distribution does not support the Deno runtime (even with the `--compat` flag). ## Proposed Solution Since the main dependency that causes issues for a Deno...
This is a proof of concept to display a working build for #280. Currently the Arquero distribution on Skypack does not work with Deno. This PR allows a cursory look...
Minimal example: ``` aq.from([]).filter(d => d.key) // or .derive({ test: d => d.key }) // or .groupby('key') // or whatever ``` throws: `Error: Invalid column reference: "d.key"` Why not return...
If reference is made to a non-existent column, an error message is (as expected) reported. However it appears to truncate the name of the misnamed column, missing off the first...
