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Principal component analysis in Python

.............................. if __name__ == "__main__": import sys csv = "iris4.csv" # wikipedia Iris_flower_data_set # 5.1,3.5,1.4,0.2 # ,Iris-setosa ... N = 1000 K = 20 fraction = .90 seed = 1 exec "\n".join( sys.argv[1:] ) # N= ... np.random.seed(seed) ...
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How can I get stock quotes using Google Finance API?

... very simple and useful. For instance: http://finance.yahoo.com/d/quotes.csv?s=GOOG+AAPL&f=snl1 Full details here: http://www.gummy-stuff.org/Yahoo-data.htm share | improve this answer ...
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App Inventor 2 屏幕管理与多屏幕教程 · App Inventor 2 中文网

....LostFocus { // 屏幕失去焦点时调用 // 适合:暂停音乐、保存临时数据 } when Screen1.BackPressed { // 用户按返回键时调用 // 适合:确认退出、保存数据 var 有未保存数据 = false if 有未保存数据 { 对话框1.ShowChooseDialog("有未保...
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显示列表 · App Inventor 2 中文网

... 将列表序列化为标签 使用列表转 csv 行 使用 while 循环 代码块如何工作 使用”从范围循环“ 使用”从列表循环“ « 返回首页 我们经常会使用列表来存储数据。例如,以下列表存储电话...
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从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术

...的使用。这些系统中的工具支持大部分教学中的特征 ,如文件共享、讨论、任务 ,以及与教学信息系统的整合。 另一方面 ,大型多人在线游戏 (Massively Multip layer Online Games,MMOG)也逐渐变为大众游戏 ,吸引了越来越多的关注。现在...
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Split a string by a delimiter in python

... You may be interested in the csv module, which is designed for comma-separated files but can be easily modified to use a custom delimiter. import csv csv.register_dialect( "myDialect", delimiter = "__", <other-options> ) lines = [ "MATCHES__STRING...
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Why does csvwriter.writerow() put a comma after each character?

...the /names at the end and opens the page and prints the string to test1.csv : 3 Answers ...
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笨法玩电商网站秒杀 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...参考我以前写的「Redis消息通知系统的实现」。 把请求保存到队列里之后,可以通过Gearman实现Worker来消费队列,请求的生产和消费是异步的,所以不会出现并发拥堵,但是可能发生延迟,如果出现这种情况,可以通过增加Worker...
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How can I split a comma delimited string into an array in PHP?

... If that string comes from a csv file, I would use fgetcsv() (or str_getcsv() if you have PHP V5.3). That will allow you to parse quoted values correctly. If it is not a csv, explode() should be the best choice. ...
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Using curl to upload POST data with files

... if you are uploading binary file such as csv, use below format to upload file curl -X POST \ 'http://localhost:8080/workers' \ -H 'authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6ImFjY2VzcyIsInR5cGUiOiJhY2Nlc3MifQ.eyJ1c2VySWQiOjEsImFjY291bnRJZCI6MSwiaWF0IjoxNTEx...