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Drop data frame columns by name

...st of names : DF <- data.frame( x=1:10, y=10:1, z=rep(5,10), a=11:20 ) drops <- c("x","z") DF[ , !(names(DF) %in% drops)] Or, alternatively, you can make a list of those to keep and refer to them by name : keeps <- c("y", "a") DF[keeps] EDIT : For those still not acquainted wi...
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]

... answered Oct 13 '11 at 10:15 Mattias WadmanMattias Wadman 10.3k22 gold badges3737 silver badges5252 bronze badges ...
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Forward declaring an enum in C++

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Java: how to convert HashMap to array

... Mayonnaise2124 17111 silver badge1212 bronze badges answered Jul 7 '09 at 5:47 Landon KuhnLandon Kuhn ...
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How does one create an InputStream from a String? [duplicate]

... answered Apr 19 '11 at 17:54 anubhavaanubhava 615k5252 gold badges422422 silver badges503503 bronze badges ...
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Printing hexadecimal characters in C

... | edited Nov 9 '11 at 4:52 answered Nov 9 '11 at 4:02 ...
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Detect IE version (prior to v9) in JavaScript

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Return empty cell from formula in Excel

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Writing/outputting HTML strings unescaped

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A worthy developer-friendly alternative to PayPal [closed]

... As of October 2013, Stripe supports merchants in 11 countries: stripe.com/global – anurag Oct 26 '13 at 23:17 3 ...