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Replacing NAs with latest non-NA value
...m the help page:
library(zoo)
az <- zoo(1:6)
bz <- zoo(c(2,NA,1,4,5,2))
na.locf(bz)
1 2 3 4 5 6
2 2 1 4 5 2
na.locf(bz, fromLast = TRUE)
1 2 3 4 5 6
2 1 1 4 5 2
cz <- zoo(c(NA,9,3,2,3,2))
na.locf(cz)
2 3 4 5 6
9 3 2 3 2
...
Why does this assert throw a format exception when comparing structures?
...
BlueRaja - Danny Pflughoeft
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answered Feb 19 '13 at 20:42
Jon SkeetJon Ske...
Get ffmpeg information in friendly way
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295
A bit late, but perhaps still relevant to someone..
ffprobe is indeed an excellent way to go. N...
cartesian product in pandas
...':[1,1], 'col1':[1,2],'col2':[3,4]})
df2 = DataFrame({'key':[1,1], 'col3':[5,6]})
merge(df1, df2,on='key')[['col1', 'col2', 'col3']]
Output:
col1 col2 col3
0 1 3 5
1 1 3 6
2 2 4 5
3 2 4 6
See here for the documentation: http://pandas.pydata....
JavaScript function similar to Python range()
... following way:
range(4) returns [0, 1, 2, 3],
range(3,6) returns [3, 4, 5],
range(0,10,2) returns [0, 2, 4, 6, 8],
range(10,0,-1) returns [10, 9, 8, 7, 6, 5, 4, 3, 2, 1],
range(8,2,-2) returns [8, 6, 4],
range(8,2) returns [],
range(8,2,2) returns [],
range(1,5,-1) returns [],
range(1,5,-2) retur...
Determining complexity for recursive functions (Big O notation)
...
5 Answers
5
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Angular.js ng-repeat across multiple tr's
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GloopyGloopy
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...
Regular expression search replace in Sublime Text 2
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599
Usually a back-reference is either $1 or \1 (backslash one) for the first capture group (the f...