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Mean per group in a data.frame [duplicate]
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@FabianHabersack You’d ?merge the result with the raw data, but you need to use different names for the aggregated object. It’s easier to do what you’re after with dplyr: d %>% group_by(Name) %>% mutate(mean1=mean(Rate1), mean2=mean(Rate2))
– ...
What does -fPIC mean when building a shared library?
...part of the code I have not looked recently). But at the time only certain letters or combinations were allowed under different conditions (there was a very complex language for defining command line arguments) as a result the 'f' was used to make it easy to define as a command line argument.
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Adjust width of input field to its input
... account styles that might occur on the input element, such as font-style, letter-spacing and so on. I've edited the answer with a live demo.
– vsync
May 16 '18 at 10:25
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What is the difference between JSF, Servlet and JSP?
... templating in JSF, so that you're forced to create custom components with raw Java code (which is a bit opaque and a lot of tedious work) when you want to replace a repeated group of components with a single component. Since JSF 2.0, JSP has been deprecated as view technology in favor of Facelets....
What is the difference between HTML tags and ?
...can change the style. As you can see, I have also wrapped a span around 2 letters in the title - this allows me to change their color in my stylesheet.
Also note that HTML5 includes a broad new set of elements that define common page structures, such as article, section, nav, etc.
Section 4.4 o...
How do you create a random string that's suitable for a session ID in PostgreSQL?
... as I expected; the produced data didn't match the pretended pattern (just letter case or just digits). I fixed by arithmetic moduling the random result: array_to_string(ARRAY(SELECT chr((65 + round((random() * 25 + id) :: integer % 25 )) :: integer) FROM generate_series(1, 60)), '');
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Search an Oracle database for tables with specific column names?
... data_type || ' (' ||
decode(data_type,'LONG',null,'LONG RAW',null,
'BLOB',null,'CLOB',null,'NUMBER',
decode(data_precision,null,to_char(data_length),
data_precision||','||data_scale
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Generate pdf from HTML in div using Javascript
...nvas) {
//! MAKE YOUR PDF
var pdf = new jsPDF('p', 'pt', 'letter');
for (var i = 0; i <= quotes.clientHeight/980; i++) {
//! This is all just html2canvas stuff
var srcImg = canvas;
var sX = 0;
var sY = 980*i; // ...
C++ map access discards qualifiers (const)
...cores (__example) or identifiers beginning an one underscore and a capital letter (_Example) are reserved. _example is not reserved.
– Ethan
Jun 1 '13 at 5:19
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Returning JSON from PHP to JavaScript?
...back ; callback({});
$Json = new json('callback', 'name');
// Just send a raw JSON ; {}
$Json = new json();
// Build data
$object = new stdClass();
$object->test = 'OK';
$arraytest = array('1','2','3');
$jsonOnly = '{"Hello" : "darling"}';
// Add some content
$Json->add('width', '565px');
$...