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How to force R to use a specified factor level as reference in a regression?
... the relevel() function. Here is an example:
set.seed(123)
x <- rnorm(100)
DF <- data.frame(x = x,
y = 4 + (1.5*x) + rnorm(100, sd = 2),
b = gl(5, 20))
head(DF)
str(DF)
m1 <- lm(y ~ x + b, data = DF)
summary(m1)
Now alter the factor b in DF by use of th...
Write string to output stream
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answered Nov 1 '10 at 13:05
MForsterMForster
7,87955 gold badges2525 silver badges3030 bronze badges
...
Why is the standard session lifetime 24 minutes (1440 seconds)?
... Session Handling and came across the session.gc_maxlifetime value of 1440 seconds.
I've been wondering why the standard value is 1440 and how it is calculated?
What is the basis for this calculation?
...
When and why would you seal a class?
...
10
The reason #1 sounds vague but, assuming we don't write "security features" most of the time, does that mean reason #1 hardly applies? Reaso...
What is the “assert” function?
...
302
assert will terminate the program (usually with a message quoting the assert statement) if its ...
What does “mro()” do?
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answered Jan 6 '10 at 3:17
Alex MartelliAlex Martelli
724k148148 gold badges11261126 silver badges13241324 bronze badges
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Url decode UTF-8 in Python
...; from urllib.parse import unquote
>>> url = 'example.com?title=%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D0%B2%D0%B0%D1%8F+%D0%B7%D0%B0%D1%89%D0%B8%D1%82%D0%B0'
>>> unquote(url)
'example.com?title=правовая+защита'
The Python 2 equivalent is urllib.unquote(), but this returns ...
Check if a method exists
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answered Apr 28 '10 at 20:26
kennytmkennytm
451k9292 gold badges980980 silver badges958958 bronze badges
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How can I String.Format a TimeSpan object with a custom format in .NET?
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250
Please note: this answer is for .Net 4.0 and above. If you want to format a TimeSpan in .Net 3....
phpinfo() - is there an easy way for seeing it?
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10
Don't forget to secure it, as output of phpinfo() should not be publicly accessible.
– binaryLV
Aug 2...