Michael Szczesny questions

Michael Szczesny answers

• numpy group by, returning original indexes sorted by the result
• logical_and with nested boolean arrays
• Numpyic way to sort a matrix based on another similar matrix
• Group pandas dataframe in unusual way
• Finding local minimum values in pandas
• arrays into pandas dataframe columns
• Torch gather middle dimension
• Efficient way to group pandas dataframe rows by a list of tags in a column
• Efficient Way of subset a dataframe into small ones based on unique values and simultaneously write out to csv file
• Numpy: reshaping of 2D array