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Group by multiple columns in dplyr, using string vector input
...ike so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the columns we want to average within
columns = names(data)[-3]
library(dplyr)
df1 <- data...
How do I compile and run a program in Java on my Mac?
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190
Compiling and running a Java application on Mac OSX, or any major operating system, is very ea...
How to name and retrieve a stash by name in git?
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21 Answers
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...espace. For example:
>>> data = '''\
Shasta California 14,200
McKinley Alaska 20,300
Fuji Japan 12,400
'''
>>> for line in data.splitlines():
print line.split()
['Shasta', 'California', '14,200']
['McKinley', 'Alaska', '20,300']
['Fuji...
Are the shift operators () arithmetic or logical in C?
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11 Answers
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How to find out which view is focused?
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113
Call getCurrentFocus() on the Activity.
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Can I specify a custom location to “search for views” in ASP.NET MVC?
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10 Answers
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How to terminate the script in JavaScript?
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21 Answers
21
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How to disable XDebug
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165
Find your php.ini and look for XDebug.
Set xdebug autostart to false
xdebug.remote_autostart...
Getting root permissions on a file inside of vi? [closed]
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10 Answers
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