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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...drop=FALSE) %>% tally
#> Species n
#> 1 setosa 50
#> 2 versicolor 50
#> 3 virginica 50
#> 4 empty_level 0
# Add character column
iris$group2 = c(rep(c("A","B"), 50), rep(c("B","C"), each=25))
# Empty groups involving combinations of Species and gro...
How exactly does the python any() function work?
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Sass - Converting Hex to RGBa for background opacity
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How can I improve my paw detection?
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359
If you're just wanting (semi) contiguous regions, there's already an easy implementation in Pyt...
In Ruby how do I generate a long string of repeated text?
... inspirations too fully.
– FMc
Jan 15 '17 at 2:12
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Getting list of lists into pandas DataFrame
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cs95
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initialize a numpy array
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ryanjdillon
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How can I check if character in a string is a letter? (Python)
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You can use str.isalpha().
For example:
s = 'a123b'
for char in s:
print(char, char.isalp...
Android phone orientation overview including compass
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edited Jul 24 '11 at 17:51
Octavian A. Damiean
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