xadupre / machinelearning_dataframe Goto Github PK

Hi Xadupre,

Currently, I am using this well implemented DataFrame package in my research project.
While in practice, I found something that maybe we can discuss.

1. Can we provide a function to check whether the DataFrame is empty. Currently, the initialization is set to null. When I call df.ColumnCount, or df.Length, it will throw exception. Although I can catch it, maybe we could initialize things to empty list instead of null.

2. Currently, it seems that the sort algorithm can just sort rows by the same direction, i.e., either ascending or descending. May I know whether the package could provide an extended sort that can sort rows by different directions, for example, there are two columns "A” and "B" to sort. It sorts "A" first in ascending order and then sort "B" in desceding order. As I know, DataTable can do this by giving expression like "A ASC, B DESC".

Many tks!

Xiaodong

'ArrgeratedFunction' class only have Min,Max,Count,Sum,Mean, could you support standard deviation function? Thanks.

The whole project fails to compile when referencing version ML v0.8. Changing the DataManipulation ML reference to 0.8 produces 168 errors

Hi there,

This is an excellent piece of work and brief note to mention.

Best

Fig