大约有 5,475 项符合查询结果（耗时：0.0394秒） [XML]
Grouping functions (tapply, by, aggregate) and the *apply family
...
+100
R has many *apply functions which are ably described in the help files (e.g. ?apply). There are enough of them, though, that beginni...
Set the absolute position of a view
...ibutes.
The following example will place a 20x20px ImageView at position (100,200) using a FrameLayout as fullscreen container:
XML
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/root"
android...
How to pass command line argument to gnuplot?
...c switch with a script that contains lines such as plot 'data' using 0:($1/100). gnuplot dies with the error invalid expression because $1 is disappeared. Where am I wrong? Note that without -c, the script runs succefully.
– lorcap
Sep 30 '15 at 15:43
...
RESTful way to create multiple items in one request
...nd a POST to /api/books to create a book. But then when you want to create 100 books (in a single request as json), which URL would you post the collection of 100 books to? that's where the restlessness begins.
– code4kix
Oct 17 '18 at 13:54
...
What does {0} mean when initializing an object?
...aggregate initializer also works:
SHELLEXECUTEINFO sexi = {};
char mytext[100] = {};
share
|
improve this answer
|
follow
|
...
Is std::vector copying the objects with a push_back?
...;Foo> FooPtr; Then make containers of FooPtrs
– pm100
Feb 16 '10 at 18:00
3
...
How do I calculate percentiles with python/numpy?
...ze = len(data)
return sorted(data)[int(math.ceil((size * percentile) / 100)) - 1]
p5 = percentile(mylist, 5)
p25 = percentile(mylist, 25)
p50 = percentile(mylist, 50)
p75 = percentile(mylist, 75)
p95 = percentile(mylist, 95)
...
How to resize an image with OpenCV2.0 and Python2.6
...ze(image, (0,0), fx=0.5, fy=0.5)
and this will resize the image to have 100 cols (width) and 50 rows (height):
resized_image = cv2.resize(image, (100, 50))
Another option is to use scipy module, by using:
small = scipy.misc.imresize(image, 0.5)
There are obviously more options you can read...
Concatenate a vector of strings/character
...
And some benchmarks:
require(microbenchmark)
test <- stri_rand_lipsum(100)
microbenchmark(stri_paste(test, collapse=''), paste(test,collapse=''), do.call(paste, c(as.list(test), sep="")))
Unit: microseconds
expr min lq mean median uq ...
How many GCC optimization levels are there?
...rpret the source code of GCC 5.1
We'll try to understand what happens on -O100, since it is not clear on the man page.
We shall conclude that:
anything above -O3 up to INT_MAX is the same as -O3, but that could easily change in the future, so don't rely on it.
GCC 5.1 runs undefined behavior if you...