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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...
CMake: Project structure with unit tests
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FraserFraser
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How to calculate a Mod b in Casio fx-991ES calculator
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How do I use FileSystemObject in VBA?
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edited Jun 20 '18 at 9:19
answered Jul 13 '10 at 10:46
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SQL Server indexes - ascending or descending, what difference does it make?
...ndex on a column or number of columns in MS SQL Server (I'm using version 2005), you can specify that the index on each column be either ascending or descending. I'm having a hard time understanding why this choice is even here. Using binary sort techniques, wouldn't a lookup be just as fast either ...
Find all files with a filename beginning with a specified string?
I have a directory with roughly 100000 files in it, and I want to perform some function on all files beginning with a specified string, which may match tens of thousands of files.
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How do I use WebStorm for Chrome Extension Development?
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edited Jul 30 '17 at 19:15
answered Aug 23 '14 at 21:53
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Django fix Admin plural
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edited Sep 13 '17 at 20:37
Chase
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answered Apr...
Position an element relative to its container
I'm trying to create a horizontal 100% stacked bar graph using HTML and CSS. I'd like to create the bars using DIVs with background colors and percentage widths depending on the values I want to graph. I also want to have a grid lines to mark an arbitrary position along the graph.
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What do @, - and + do as prefixes to recipe lines in Make?
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answered Aug 13 '10 at 13:44
Jonathan LefflerJonathan Leffler
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