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How to drop columns by name in a data frame
...exing or the subset function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %in% c("z","u"))]
x ...
How to skip “are you sure Y/N” when deleting files in batch files
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Kerrek SBKerrek SB
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How to compile without warnings being treated as errors?
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answered Jul 19 '12 at 12:52
Daniel FischerDaniel Fischer
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Find row where values for column is maximal in a pandas DataFrame
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252
Use the pandas idxmax function. It's straightforward:
>>> import pandas
>>> ...
Difference between static STATIC_URL and STATIC_ROOT on Django
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edited Jan 21 '19 at 5:35
answered Sep 5 '13 at 6:09
s...
How to send JSON instead of a query string with $.ajax?
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257
You need to use JSON.stringify to first serialize your object to JSON, and then specify the con...
Why does GCC generate such radically different assembly for nearly the same C code?
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256
Updated to sync with the OP's edit
By tinkering with the code, I've managed to see how GCC opti...
How to translate between Windows and IANA time zones?
... Johnson-PintMatt Johnson-Pint
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Jquery selector input[type=text]')
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Andreas WongAndreas Wong
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Where is Vagrant saving changes to the VM?
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edited May 21 '14 at 15:33
Community♦
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answered Nov 30 '11 at 19:34
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