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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...
what is the difference between sendStickyBroadcast and sendBroadcast in Android
...
120
Here is what the Android SDK says about sendStickyBroadcast():
Perform a sendBroadcast(Inten...
How to use JavaScript source maps (.map files)?
... |
edited Jul 1 at 2:05
Leniel Maccaferri
91.3k4040 gold badges331331 silver badges445445 bronze badges
...
半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术
...har *strSrc, int nMaxLen)
{
if (strSrc == NULL || nMaxLen == 0)
{
return NULL;
}
int len = strlen(strSrc);
if (len == 0)
{
return strSrc;
}
int size = len; bool bFlag = false;
if (len >= n...
What is the JavaScript convention for no operation?
... Function.prototype();
console.log('End : ', Date.now());
}, 1000);
Although this is a "true noop" since most browsers seem to do nothing to execute the noop defined this way (and hence save CPU cycles), there might be some performance issues associated with this (as is also mentione...
How does java do modulus calculations with negative numbers?
...
104
Both definitions of modulus of negative numbers are in use - some languages use one definition ...
Does it make any sense to use inline keyword with templates?
...
/tmp/ccfWLeDX.o: In function `int g<int>(int)':
inlinexx2.cc:(.text+0x0): multiple definition of `int g<int>(int)'
/tmp/ccUa4K20.o:inlinexx.cc:(.text+0x0): first defined here
collect2: ld returned 1 exit status
Not stating inline when doing explicit instantiation may also lead to issu...
What does “all” stand for in a makefile?
...
answered Mar 25 '10 at 11:26
P ShvedP Shved
83.1k1414 gold badges113113 silver badges160160 bronze badges
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Difference between CC, gcc and g++?
...pilers all generally hew fairly close to the current standards (C++98, C++2003, C99), but there are usually small differences between the standard language and the language supported by the compiler. The older C89 standard support is essentially the same (and complete) for all C compilers. There a...
Twig for loop for arrays with keys
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answered Apr 24 '12 at 14:00
GuillaumeGuillaume
7,7011010 gold badges4343 silver badges6161 bronze badges
...