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How to succinctly write a formula with many variables from a data frame?
...in a formula to mean all the variables, it is the . identifier.
y <- c(1,4,6)
d <- data.frame(y = y, x1 = c(4,-1,3), x2 = c(3,9,8), x3 = c(4,-4,-2))
mod <- lm(y ~ ., data = d)
You can also do things like this, to use all variables but one (in this case x3 is excluded):
mod <- lm(y ~ ...
What GUI libraries are the JetBrains using?
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1 Answer
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Save file to specific folder with curl command
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edited Sep 23 '18 at 6:08
anatoly techtonik
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Understanding Canvas and Surface concepts
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answered Jan 2 '11 at 5:14
hackbodhackbod
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How to parse unix timestamp to time.Time
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"time"
"strconv"
)
func main() {
i, err := strconv.ParseInt("1405544146", 10, 64)
if err != nil {
panic(err)
}
tm := time.Unix(i, 0)
fmt.Println(tm)
}
Output:
2014-07-16 20:55:46 +0000 UTC
Playground: http://play.golang.org/p/v_j6UIro7a
Edit:
Changed from...
What's the 'environment' task in Rake?
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121
You can get access to your models, and in fact, your whole environment by making tasks depende...
Insert a line at specific line number with sed or awk
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edited Nov 9 '14 at 0:18
answered Jun 30 '11 at 15:54
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How to write string literals in python without having to escape them?
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127
Raw string literals:
>>> r'abc\dev\t'
'abc\\dev\\t'
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SELECT INTO using Oracle
... never be true:
create table new_table as
select * from old_table
where 1 = 2
/
Remember that CREATE TABLE ... AS SELECT creates only a table with the same projection as the source table. The new table does not have any constraints, triggers or indexes which the original table might have. Those...