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Combine two or more columns in a dataframe into a new column with a new name
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132
Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb ...
Remove multiple whitespaces
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uınbɐɥs
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answered Feb 24 '10 at 13:21
CezCez
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Decimal number regular expression, where digit after decimal is optional
...decimals.
– Alex G
Oct 22 '17 at 23:32
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how to check if object already exists in a list
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Rex MRex M
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Check string for palindrome
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Michael Myers♦
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answered Nov 9 '10 at 21:32
dcpdcp
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How to change default timezone for Active Record in Rails?
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– Enrique Moreno Tent
Mar 2 '16 at 13:32
@Mihai-AndreiDinculescu Do you think that is better to store the datetime value...
How set background drawable programmatically in Android
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edited May 30 '17 at 19:32
answered Sep 21 '12 at 1:09
Ah...
ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file
...Oracle\Java\javapath;C:\Program Files (x86)\Java\jre6\bin;C:\WINDOWS\System32\WindowsPowerShell\v1.0\ (and many other entries)
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Git - Ignore files during merge
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eigenharshaeigenharsha
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How do I fix “Failed to sync vcpu reg” error?
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JP2014JP2014
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