dataframe

vaex.from_arrays(s=['a,b']).s.str.replace(r'(\w+)',r'--\g<1>==',regex=True)

when using capture group in str, it fails, while str_pandas.replace() is correct

Name: vaex
Version: 4.6.0
Summary: Out-of-Core DataFrames to visualize and explore big tabular datasets
Home-page:

Is your feature request related to a problem? Please describe.
Hi,

While porting some code from Pandas to cuDF, I have noticed that cuDF series do not support unstack method.
As an additional request, It would be great if fill_values could be supported in both cudf.DataFrame.unstack and cudf.Series.unstack methods. Thanks!

Describe the solution you'd like
To have that meth

Edited request

Can polars allow mixing string and type selection using col(["x", pl.Int64])

See suggestion here.

Initial request

Any thoughts on an .include() method that is the opposite of .exclude()?

That way these would both work:

df.select(col('x').include(pl.Int64))

df.se

Describe the bug

df.sort_values() failed when input dataframe is empty.

To Reproduce
To help us reproducing this bug, please provide information below:

1. Your Python version
2. The version of Mars you use
3. Versions of crucia

It would be really useful if there was a method that could insert a column into an existing Dataframe between two existing columns. I know about .addColumn, but that seems to place the new column at the end of the Dataframe.

For example:

df.print()

A | B 
======
7 | 5
3 | 6

df.insert({ "afterColumn": "A", "newColumnName": "C", "data": [4,1], inplace: true })
df.print()

Which version are you running? The lastest version is on Github. Pip is for major releases.
0.3.14b0

Describe the solution you'd like
I would like have following indicators on pandas_ta repository:

• Jurik's DMX
• Jurikäs CFB

DMX indicator is made for MT4 and the code for it can be found here (https://forex-station.com/viewtopic.php?p=1295447361#p1295447361)

CFB indicator

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
I am trying to programatically create Exprs that represent function calls, for example to_timetsamp(x, 4) or something

To do so today you have to do something like this (from simplify_expressions.rs) which is 🤮

        // to_timestamp("2020-09-08T12:00:00+00:00")
       

It does not help users view the data when all that is printed on the screen is column names.

Here is pillar output where the number of columns goes into the thousands

Background

This thread is borne out of the discussion from #968 , in an effort to make documentation more beginner-friendly & more understandable.
One of the subtasks mentioned in that thread was to go through the function docstrings and include a minimal working example to each of the public functions in pyjanitor.

Criteria reiterated here for the benefit of discussion:

It sh

pdpipe uses PdpApplicationContext objects in two ways:

1. As the fit_context that should be kept as-is after a fit, and used by stages to pass to one another parameters that should also be used on transform time.
2. As the application_context that should be discarded after a specific application is done, and is used by stages to feed consecutive stages with context. It can be added to by s

Hi,
any ideas how to implement TradingView Pine RMA ?