大约有 1,200 项符合查询结果(耗时:0.0149秒) [XML]

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How to get the first column of a pandas DataFrame as a Series?

... This works great when you want to load a series from a csv file x = pd.read_csv('x.csv', index_col=False, names=['x'],header=None).iloc[:,0] print(type(x)) print(x.head(10)) <class 'pandas.core.series.Series'> 0 110.96 1 119.40 2 135.89 3 152.32 4 192.91 5...
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Converting string to numeric [duplicate]

... "NoData". What do expect/want as.numeric to do with these values? In read.csv, try using the argument stringsAsFactors=FALSE Are you sure it's sep="/t and not sep="\t" Use the command head(pitchman) to check the first fews rows of your data Also, it's very tricky to guess what your problem is when ...
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How to save a list as numpy array in python?

... Here is a more complete example: import csv import numpy as np with open('filename','rb') as csvfile: cdl = list( csv.reader(csvfile,delimiter='\t')) print "Number of records = " + str(len(cdl)) #then later npcdl = np.array(cdl) Hope this helps!! ...
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Select Pandas rows based on list index

...a the skiprows parameter. Example pred = lambda x: x not in [1, 3] pd.read_csv("data.csv", skiprows=pred, index_col=0, names=...) This will now return a DataFrame from a file that skips all rows except 1 and 3. Details From the docs: skiprows : list-like or integer or callable, default None ... I...
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Most underused data visualization [closed]

... <- Sys.Date() quote <- paste("http://ichart.finance.yahoo.com/table.csv?s=", stock, "&a=", substr(start.date,6,7), "&b=", substr(start.date, 9, 10), "&c=", substr(start.date, 1,4), "&d=", substr(end.date,6,7), ...
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php implode (101) with quotes

..._map(): function add_quotes($str) { return sprintf("'%s'", $str); } $csv = implode(',', array_map('add_quotes', $array)); DEMO Also note that there is fputcsv if you want to write to a file. share | ...
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Citrix服务器虚拟化:XenApp 6.5发布服务器上的应用程序 - 更多技术 - 清泛...

...站点添加到用户设备上的 InternetExplorer 中的“可信站点”列表。在发布要通过流技术推送到服务器的应用程序之前,请确保将 WebInterface 站点和 CitrixXenApp 站点配置为运行以下应用程序类型之一:仅远程应用程序,或双模式流技...
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test a file upload using rspec - rails

...e = Rack::Test::UploadedFile.new(Rails.root.join('spec/fixtures/files/test.csv'), 'text/csv') – Mike Blyth Sep 3 '12 at 10:04 ...
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Converting from IEnumerable to List [duplicate]

...example: IEnumerable<string> stringEnumerable = null; StringBuilder csv = new StringBuilder(); stringEnumerable.ToNonNullList().ForEach(str=> csv.Append(str).Append(",")); Here is the extension method: public static List<T> ToNonNullList<T>(this IEnumerable<T> obj) { ...
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What is the difference between map and flatMap and a good use case for each?

... where is the number of elements of input and output are the same. number.csv 1 2 3 - 4 - 5 map.py adds all numbers in add.csv. from operator import * def f(row): try: return float(row) except Exception: return 0 rdd = sc.textFile('a.csv').map(f) print(rdd.count()) # 7 print...