大约有 48,000 项符合查询结果（耗时：0.0554秒） [XML]
Confusion between factor levels and factor labels
...ends?
– donodarazao
May 3 '11 at 13:02
6
I would often transform the levels right before plotting...
jQuery.active function
... and $.ajaxStop() (which I'll explain further), but they only care if it's 0 or not when a request starts or stops. But, since there's no reason to hide it, it's exposed to you can see the actual number of simultaneous AJAX requests currently going on.
When jQuery starts an AJAX request, this ha...
Export Postgresql table data using pgAdmin
...|
edited Nov 25 '16 at 15:06
Alfonso Tienda
2,72511 gold badge1313 silver badges2727 bronze badges
answe...
Simple calculations for working with lat/lon and km distance?
...
The approximate conversions are:
Latitude: 1 deg = 110.574 km
Longitude: 1 deg = 111.320*cos(latitude) km
This doesn't fully correct for the Earth's polar flattening - for that you'd probably want a more complicated formula using the WGS84 reference ellipsoid (the model used ...
How can you detect the version of a browser?
...
508
You can see what the browser says, and use that information for logging or testing multiple bro...
How do I fix blurry text in my HTML5 canvas?
I am a total n00b with HTML5 and am working with the canvas to render shapes, colors, and text. In my app, I have a view adapter that creates a canvas dynamically, and fills it with content. This works really nicely, except that my text is rendered very fuzzy/blurry/stretched. I have seen a ...
How I can I lazily read multiple JSON values from a file/stream in Python?
...
20
Here's a much, much simpler solution. The secret is to try, fail, and use the information in th...
Responsive iframe using Bootstrap
...
answered Aug 10 '14 at 20:52
ChristinaChristina
31.5k1717 gold badges7474 silver badges117117 bronze badges
...
Installing older version of R package
...geurl <- "http://cran.r-project.org/src/contrib/Archive/ggplot2/ggplot2_0.9.1.tar.gz"
install.packages(packageurl, repos=NULL, type="source")
If this doesn't work for you and you're on Windows, the reason is probably the lack of an appropriate tool chain for building/compiling packages. Normall...
PHP substring extraction. Get the string before the first '/' or the whole string
...
Use explode()
$arr = explode("/", $string, 2);
$first = $arr[0];
In this case, I'm using the limit parameter to explode so that php won't scan the string any more than what's needed.
share
|
...