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Calculating moving average
...comment from @Ricardo Cruz:
cx <- c(0, cumsum(ifelse(is.na(x), 0, x)))
cn <- c(0, cumsum(ifelse(is.na(x), 0, 1)))
rx <- cx[(n+1):length(cx)] - cx[1:(length(cx) - n)]
rn <- cn[(n+1):length(cx)] - cn[1:(length(cx) - n)]
rsum <- rx / rn
This still has the issue that if all the values ...
Get operating system info
...y('plan9', 'Plan9');
$ros[] = array('osf', 'OSF');
$ros[] = array('aix', 'AIX');
$ros[] = array('GNU Hurd', 'GNU Hurd');
$ros[] = array('(fedora)', 'Linux - Fedora');
$ros[] = array('(kubuntu)', 'Linux - Kubuntu');
$ros[] = array('(ubuntu)', 'Linux - Ubuntu');
$ros[] = ar...
Python - abs vs fabs
...
@aix Any user defined class that defines the __abs__ magic method
– agf
May 27 '12 at 17:59
add a com...
How can I remove a character from a string using Javascript?
...g = mystring.replace(/\/r/g, '/');
EDIT:
Since everyone's having so much fun here and user1293504 doesn't seem to be coming back any time soon to answer clarifying questions, here's a method to remove the Nth character from a string:
String.prototype.removeCharAt = function (i) {
var tmp = th...
ContinuousSpeech 连续语音识别扩展：持续语音识别无需重复启动 · App Inventor 2 中文网
...持：支持设置不同的识别语言
下载
.aix拓展文件：
de.ullisroboterseite.ursai2continuousspeech.aix
.aia示例文件：
ContSpeechTest.aia
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1.0...
keytool error :java.io.IoException:Incorrect AVA format
...PatrickTaylor -validity 10000
-keystore C:\drops\patrickkeystore
-dname "cn=Patrick Taylor, ou=engineering, o=company, c=US"
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RadioButton单选按钮扩展集合 · App Inventor 2 中文网
...载和安装
UrsAI2RadioButton扩展: UrsAI2RadioButton.aix
示例应用: RadioButtonExample.aia
功能概述
UrsAI2RadioButton扩展将CheckBox组件转换为RadioButton组件，提供真正的单选功能：
将CheckBox转换为RadioButton外观
...
ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
...mailPicker
邮箱选择器
下载
.aix拓展文件：
de.UllisRoboterSeite.UrsAI2ComponentGroup.aix
.aia示例文件：
UrsComponentGroupTest.aia
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CSS to stop text wrapping under image
... to use a <p> element as a parent for your <span>.
<li id="CN2787">
<img class="fav_star" src="images/fav.png">
<p>
<span>Text, text and more text</span>
</p>
</li>
Since <p> is a block element, you can set its width using CSS...
Reorder levels of a factor without changing order of values
...
some more, just for the record
## reorder is a base function
df$letters <- reorder(df$letters, new.order=letters[4:1])
library(gdata)
df$letters <- reorder.factor(df$letters, letters[4:1])
You may also find useful Relevel and combine_factor.
...