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GroupBy pandas DataFrame and select most common value
I have a data frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
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Issue with virtualenv - cannot activate
I created a virtualenv around my project, but when I try to activate it I cannot.
It might just be syntax or folder location, but I am stumped right now.
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How does a Breadth-First Search work when looking for Shortest Path?
I've done some research, and I seem to be missing one small part of this algorithm. I understand how a Breadth-First Search works, but I don't understand how exactly it will get me to a specific path, as opposed to just telling me where each individual node can go. I guess the easiest way to explain...
How to run a python script from IDLE interactive shell?
How do I run a python script from within the IDLE interactive shell?
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Windows XP or later Windows: How can I run a batch file in the background with no window displayed?
I know I have already answered a similar question ( Running Batch File in background when windows boots up ), but this time I need to launch a batch:
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filter for complete cases in data.frame using dplyr (case-wise deletion)
Is it possible to filter a data.frame for complete cases using dplyr? complete.cases with a list of all variables works, of course. But that is a) verbose when there are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
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Access denied for user 'root@localhost' (using password:NO)
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SQL RANK() versus ROW_NUMBER()
I'm confused about the differences between these. Running the following SQL gets me two idential result sets. Can someone please explain the differences?
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How to join two sets in one line without using “|”
...at S and T are assigned sets. Without using the join operator | , how can I find the union of the two sets? This, for example, finds the intersection:
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VIM Replace word with contents of paste buffer?
I need to do a bunch of word replacements in a file and want to do it with a vi command, not an EX command such as :%s///g . I know that this is the typical way one replaces the word at the current cursor position: cw<text><esc> but is there a way to do this with the contents of the u...