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Convert column classes in data.table
...uarter: chr "1" "2" "3" "4" ...
$ value : num -0.838 0.146 -1.059 -1.197 0.282 ...
Using lapply and as.character:
dtnew <- dt[, lapply(.SD, as.character), by=ID]
str(dtnew)
Classes ‘data.table’ and 'data.frame': 10 obs. of 3 variables:
$ ID : Factor w/ 2 levels "A","B": 1 1 1...
How to create a checkbox with a clickable label?
... Wesley MurchWesley Murch
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Make anchor link go some pixels above where it's linked to
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edited Mar 8 '17 at 5:52
answered Jul 8 '13 at 20:07
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Font from origin has been blocked from loading by Cross-Origin Resource Sharing policy
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answered Jan 30 '15 at 13:27
Giovanni Di GregorioGiovanni Di Gregorio
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Get the index of the nth occurrence of a string?
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Jon SkeetJon Skeet
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How to check if a process id (PID) exists
...checking if it exists. See linux.die.net/man/2/kill and linux.die.net/man/7/signal
– Christoffer Hammarström
Jun 15 '10 at 10:58
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How to set Java environment path in Ubuntu
...dit /etc/profile
Add following lines in end
JAVA_HOME=/usr/lib/jvm/jdk1.7.0
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH
Then Log out and Log in ubuntu for setting up the paths...
sha...
Debugging WebSocket in Google Chrome
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spottedmahn
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answered Apr 22 '11 at 15:47
kanakakanaka
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How to cherry-pick multiple commits
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Git 1.7.2 introduced the ability to cherry pick a range of commits. From the release notes:
git cherry-pick learned to pick a range of commits
(e.g. cherry-pick A..B and cherry-pick --stdin), so did git revert; these do not s...
How do I convert a column of text URLs into active hyperlinks in Excel?
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edited Oct 19 '17 at 4:14
John Rocha
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a...