Lets say I have the following list in python. It is ordered first by Equip, then by Date:What I want to do is collapse the list by each set where a given piece of Equipment's job does not change, and grab the first and last date the equipment was there....
I have a pandas dataframe that looks as follows:I want to perform an aggregate groupby that adds the lists stored in the Y columns element-wise. Code I have tried:
In C++14 (gcc 6.3) I have the following code:When running valgrind i have a memory leak : it looks like the objects created by "makeB()" function were not freed. I had this problem only when using aggregate initialization with curly braces.
I have I wantBut this......gives me In words I want the "grp" letters to go from 1 to whenever it reaches the last unique combination of study*n1i.