dandandan

**Is there a simple way to transform py-porlars examples to rust polars examples?** I want to transform code from py-polars to rust polars , because rust polars is faster, and...

@jorgecarleitao @ritchie46 As this idea hasn't been realezed in Arrow2 crate, here is my case: **How can I update MutablePrimitiveArray value after computing between a MutablePrimitiveArray and PrimitiveArray?** My example...

@ritchie46 Hi, I think here exits a bug, Now Pearson_corr only support matrix that row number equals col number, otherwise it will raise Exception like: ```python df = pl.DataFrame({"foo": [1,...

@Dermotholmes I also think so, because polars expr like rolling_apply/rolling_mean all take a window backward, it's weird to take a window forward in groupby_rolling/groupby_dynamic.

@Dermotholmes But It doens't work actually... the window is still positioned by first datapoint use start by = 'datapoint' ```python import io import polars as pl csv = """ date,group,value...

@cmdlineluser I do so, but the date column is not I want, I want `2022-01-03` with value [1, 2, 3], not `2022-01-01`. ```python df.groupby_dynamic(index_column="date", every = '1d',period="3d", offset='-2d', closed="left", by...

Thank you for the reply! I notice the sentence "import htkmfc as htk " in code spk_dnn.py, How do I install that software, is that this? https://github.com/skerit/cmusphinx/tree/master/SphinxTrain