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How to force R to use a specified factor level as reference in a regression?
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See 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 ...
Pythonic way to check if a list is sorted or not
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23 Answers
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Install dependencies globally and locally using package.json
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answered May 30 '12 at 9:05
Jason LivesayJason Livesay
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Installing SetupTools on 64-bit Windows
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Apparently (having faced related 64- and 32-bit issues on OS X) there is a bug in the Windows installer. I stumbled across this workaround, which might help - basically, you create your own registry value HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Python\PythonCore\2.6...
Why does `a == b or c or d` always evaluate to True?
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3 Answers
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Changing Font Size For UITableView Section Headers
...l *myLabel = [[UILabel alloc] init];
myLabel.frame = CGRectMake(20, 8, 320, 20);
myLabel.font = [UIFont boldSystemFontOfSize:18];
myLabel.text = [self tableView:tableView titleForHeaderInSection:section];
UIView *headerView = [[UIView alloc] init];
[headerView addSubview:myLabel...
Regex replace uppercase with lowercase letters
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answered Dec 23 '13 at 11:09
Alex K.Alex K.
154k2424 gold badges236236 silver badges263263 bronze badges
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Calculating Pearson correlation and significance in Python
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SachaSacha
3,38022 gold badges1313 silver badges1010 bronze badges
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How to shuffle a std::vector?
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203
From C++11 onwards, you should prefer:
#include <algorithm>
#include <random>
auto...
Installing specific package versions with pip
...the --no-site-packages option. The current version shown in PyPi is 1.2.3 . Is there a way to install the older version? I found an article stating that this should do it:
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