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Omit rows containing specific column of NA
...nction and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data[completeVec, ])
}
completeFun(DF, "y")
# x y z
# 1 1 0 NA
# 2...
Turn off constraints temporarily (MS SQL)
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edited Jun 22 '11 at 14:53
Brian Gideon
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answe...
What is the recommended batch size for SqlBulkCopy?
...ut 6M qualified rows, averaging 5 columns of decimal and short text, about 30 bytes per row.
Given this scenario, I found a batch size of 5,000 to be the best compromise of speed and memory consumption. I started with 500 and experimented with larger. I found 5000 to be 2.5x faster, on average, th...
windows下捕获dump之Google breakpad_client的理解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ReadProcessMemory读取客户进程的信息；（2）、生成dump；（3）、触发dump生成事件，通知客户进程，复位触发dump事件。
3、RequestUpload
首先客户进程连接上服务进程，接着客户进程写MESSAGE_TAG_UPLOAD_REQUEST消息到管道，写完关闭管道。...
HEAD and ORIG_HEAD in Git
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HEAD is (direct or indirect, i.e. symbolic) reference to the current commit. It is a commit th...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
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GumboGumbo
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How can I redirect HTTP requests made from an iPad?
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tremoloquitremoloqui
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
... UTF-8. Here is my terminal
$ echo $LANG
en_GB.UTF-8
$ python
Python 2.7.3 (default, Apr 20 2012, 22:39:59)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '(\xef\xbd\xa1\xef\xbd\xa5\xcf\x89\xef\xbd\xa5\xef\xbd\xa1)\xef\xbe\x89'
>&g...
Renaming table in rails
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vergenzt
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answered Jan 8 '11 at 0:49
camcam
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Set margin size when converting from Markdown to PDF with pandoc
... massive margins (like this http://johnmacfarlane.net/pandoc/demo/example13.pdf ). How can I get pandoc to produce something with smaller margins? I have looked through the pandoc user guide, but haven't found anything useful.
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