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Can I embed a custom font in an iPhone application?
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Juan Carlos Méndez
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answered Apr 11 '10 at 5:01
samvermettesamvermette
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Can you require two form fields to match with HTML5?
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edited Aug 10 '15 at 11:40
Der Hochstapler
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Add string in a certain position in Python
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answered Mar 10 '11 at 1:34
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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In what areas might the use of F# be more appropriate than C#? [closed]
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edited May 8 '10 at 14:01
community wiki
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Checking for an empty field with MySQL
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edited Feb 24 '10 at 15:30
answered Feb 24 '10 at 15:20
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What are the benefits of learning Vim? [closed]
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I've been using vi and vim also for some 20 years, and I'm still learning new things.
David Rayner's Best of Vim Tips site is an excellent list, though it's probably more useful once you have some familiarity with vim.
I also want to mention the ViEmu site which ha...
What does threadsafe mean?
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answered Jan 9 '10 at 15:51
Gregory PakoszGregory Pakosz
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Elegant way to search for UTF-8 files with BOM?
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answered May 18 '10 at 15:37
DenisDenis
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jquery select change event get selected option
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– JoshWillik
Jan 20 '14 at 22:08
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@JoshWillik with $("selector", this) you ar...
Subset of rows containing NA (missing) values in a chosen column of a data frame
....na() instead. This should do it:
new_DF <- DF[rowSums(is.na(DF)) > 0,]
or in case you want to check a particular column, you can also use
new_DF <- DF[is.na(DF$Var),]
In case you have NA character values, first run
Df[Df=='NA'] <- NA
to replace them with missing values.
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