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How to succinctly write a formula with many variables from a data frame?
... 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 ~ . ...
Replacement for “rename” in dplyr
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148
dplyr version 0.3 added a new rename() function that works just like plyr::rename().
df <- ...
Is the buildSessionFactory() Configuration method deprecated in Hibernate
When I updated the Hibernate version from 3.6.8 to 4.0.0, I got a warning about deprecated method buildSessionFactory() in this line:
...
Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an
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answered Jun 2 '10 at 4:09
Nick Craver♦Nick Craver
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Change name of iPhone app in Xcode 4
...me which is displayed below the app icon on the iPhone screen.
I use Xcode 4 and I have one target with keys:
11 Answers
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How to deep copy a list?
...hon objects.
See the following snippet -
>>> a = [[1, 2, 3], [4, 5, 6]]
>>> b = list(a)
>>> a
[[1, 2, 3], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b # b changes too -> Not a deep...
What's the fastest way to merge/join data.frames in R?
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46
The match approach works when there is a unique key in the second data frame for each key value...
How can I wait for set of asynchronous callback functions?
...times out after a long time.
jQuery Promises
Adding to my answer in 2014. These days, promises are often used to solve this type of problem since jQuery's $.ajax() already returns a promise and $.when() will let you know when a group of promises are all resolved and will collect the return resu...
HTML5 Video Dimensions
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<video id="foo" src="foo.mp4"></video>
var vid = document.getElementById("foo");
vid.videoHeight; // returns the intrinsic height of the video
vid.videoWidth; // returns the intrinsic width of the video
Spec: https://html.spec.whatwg.org/mu...