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git rebase fatal: Needed a single revision
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edited Jan 25 '11 at 23:05
answered Jan 25 '11 at 20:09
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Call apply-like function on each row of dataframe with multiple arguments from each row
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answered Feb 25 '13 at 2:18
agstudyagstudy
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Comparing two dataframes and getting the differences
...gt;>> df.reindex(idx)
Date Fruit Num Color
9 2013-11-25 Orange 8.6 Orange
8 2013-11-25 Apple 22.1 Red
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Is Java a Compiled or an Interpreted programming language ?
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answered Aug 25 '09 at 4:41
Mehrdad AfshariMehrdad Afshari
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Differences in boolean operators: & vs && and | vs ||
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answered Oct 25 '10 at 12:34
Justin NiessnerJustin Niessner
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Calendar date to yyyy-MM-dd format in java
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answered Sep 25 '12 at 4:27
MadProgrammerMadProgrammer
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...character column
iris$group2 = c(rep(c("A","B"), 50), rep(c("B","C"), each=25))
# Empty groups involving combinations of Species and group2 are not included in output
iris %>% group_by(Species, group2, .drop=FALSE) %>% tally
#> Species group2 n
#> 1 setosa A 25
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How to flatten only some dimensions of a numpy array
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Take a look at numpy.reshape .
>>> arr = numpy.zeros((50,100,25))
>>> arr.shape
# (50, 100, 25)
>>> new_arr = arr.reshape(5000,25)
>>> new_arr.shape
# (5000, 25)
# One shape dimension can be -1.
# In this case, the value is inferred from
# the length o...
Converting a double to an int in C#
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edited May 25 '12 at 12:44
answered May 25 '12 at 12:17
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