大约有 23,000 项符合查询结果（耗时：0.0307秒） [XML]
Mean per group in a data.frame [duplicate]
... 2 67 43
Cat 3 45 32
', header = TRUE, stringsAsFactors = FALSE, na.strings = 'NA')
Rate1.mean <- with(my.data, ave(Rate1, Month, FUN = function(x) mean(x, na.rm = TRUE)))
Rate2.mean <- with(my.data, ave(Rate2, Month, FUN = function(x) mean(x, na.rm = TRUE)...
How to check version of python modules?
...l; print(lxml.__version__)"
Traceback (most recent call last):
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute '__version__'
Lastly, as the commands in your question are prefixed with sudo, it appears you're installing to the global python enviro...
How do I POST urlencoded form data with $http without jQuery?
...
I think you need to do is to transform your data from object not to JSON string, but to url params.
From Ben Nadel's blog.
By default, the $http service will transform the outgoing request by
serializing the data as JSON and then posting it with the content-
type, "application/json". When we want...
Call a controller function from a directive without isolated scope in AngularJS
...on,
<button ... confirm-action="doIt()">Do It</button>
is the string "doIt()", and you can't call a string, e.g. "doIt()"().
Your question really is:
How do I call a function when I have its name as a string?
In JavaScript, you mostly call functions using dot notation, like this:
some...
Compiler error: memset was not declared in this scope
...
You should include <string.h> (or its C++ equivalent, <cstring>).
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How can I share code between Node.js and the browser?
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Don't forget that the string representation of a JavaScript function represents the source code for that function. You could simply write your functions and constructors in an encapsulated way so they can be toString()'d and sent to the client.
A...
Simplest way to serve static data from outside the application server in a Java web application
...Windows as well without the need to fiddle around with ugly File.separator string-concatenations. It would however only be scanned on the same working disk as from where this command is been invoked. So if Tomcat is for example installed on C: then the /path/to/files would actually point to C:\path\...
How to avoid scientific notation for large numbers in JavaScript?
...nction toFixed(x) {
if (Math.abs(x) < 1.0) {
var e = parseInt(x.toString().split('e-')[1]);
if (e) {
x *= Math.pow(10,e-1);
x = '0.' + (new Array(e)).join('0') + x.toString().substring(2);
}
} else {
var e = parseInt(x.toString().split('+')[1]);
if (e > ...
Android: java.lang.SecurityException: Permission Denial: start Intent
...activity>
and
<activity android:name=".myclass" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
&l...
Finding the source code for built-in Python functions?
...>> help(str)
Help on class str in module __builtin__:
class str(basestring)
| str(object='') -> string
|
| Return a nice string representation of the object.
| If the argument is a string, the return value is the same object.
|
| Method resolution order:
| str
| bases...