import-csv

fread in R imports a large .csv file as a data frame with one row

由 杀马特。学长 韩版系。学妹 提交于 2019-12-12 09:37:20
问题 I'm importing a large .csv file into R (about 0.5 million rows), so I've been trying to use fread() from the data.table package as a faster alternative to read.table() and read.csv(). However, fread() returns a data frame with all of the data from the rows inside one row, even though it has the correct number of columns. I found a bug report from 2013 showing this is related to the integer64 data class: http://r-forge.r-project.org/tracker/index.php?func=detail&aid=2786&group_id=240&atid=975

VBA Import CSV file

由 送分小仙女□ 提交于 2019-12-12 06:05:00
问题 My macro can import text files from a folder: DoCmd.TransferText acImportDelim, .... But now, I no longer need to import text files, I need to import csv files. How can I implement the code to achieve this? 来源： https://stackoverflow.com/questions/43923256/vba-import-csv-file

writing data to csv from dictionaries with multiple values per key

由 不打扰是莪最后的温柔 提交于 2019-12-11 20:38:59
问题 Background I am storing data in dictionaries. The dictionaries can be off different length and in a particular dictionary there could be keys with multiple values. I am trying to spit out the data on a CSV file. Problem/Solution Image 1 is how my actual output prints out. Image 2 shows how i would want my output to actually printout. Image 2 is the desired output . CODE import csv from itertools import izip_longest e = {'Lebron':[25,10],'Ray':[40,15]} c = {'Nba':5000} def writeData(): with

FileNotFoundError while importing a csv file using pandas in Jupyter notebook

由 ℡╲_俬逩灬. 提交于 2019-12-04 13:32:31
Screenshot of the described error. import pandas as pd df = pd.read_csv('/home/josepm/Documents/test_ver2.csv') --------------------------------------------------------------------------- FileNotFoundError Traceback (most recent call last) <ipython-input-3-5cd7fd573fb7> in <module>() 1 import pandas as pd ----> 2 df = pd.read_csv('/home/josepm/Documents/test_ver2.csv') I try to import a CSV file using pandas and every time it says that it doesn't find the file. It's like Jupyter doesn't see it. I tried to do this: import os os.path.isfile('/home/josepm/Documents/test_ver2.csv') and it doesn't

Importing CSV having Duplicate Column names with SQL Query

由 只谈情不闲聊 提交于 2019-12-01 14:37:01
I have 3 csv files located in different network folders. The network folders/sub-folders may have spaces in them. I want to join these 3 csv files to create a single ADO Recordset containing required columns. Test1.csv (I have excluded unnecessary columns from all csv's) T1Id | Gpos | lbl ----------------------- 1001 | 0 | Innovate 1002 | 1 | Buys 1003 | 2 | Sales 1004 | 3 | Forecasts 1005 | 4 | Usage 1006 | 5 | Forum Test2.csv: (I have excluded unnecessary columns from all csv's) T2Id | T1Id | Apos | tval ----------------------------------- 382 | 1001 | 1 | my life my rules. 203 | 1001 | 2 |

Importing CSV having Duplicate Column names with SQL Query

由 喜欢而已 提交于 2019-12-01 12:58:09
问题 I have 3 csv files located in different network folders. The network folders/sub-folders may have spaces in them. I want to join these 3 csv files to create a single ADO Recordset containing required columns. Test1.csv (I have excluded unnecessary columns from all csv's) T1Id | Gpos | lbl ----------------------- 1001 | 0 | Innovate 1002 | 1 | Buys 1003 | 2 | Sales 1004 | 3 | Forecasts 1005 | 4 | Usage 1006 | 5 | Forum Test2.csv: (I have excluded unnecessary columns from all csv's) T2Id | T1Id

Reading CSV file some missing columns

由 泪湿孤枕 提交于 2019-11-30 22:48:34
问题 I am trying to read in a CSV file into my VB.net application using the following code: While Not EOF(1) Input(1, dummy) Input(1, phone_number) Input(1, username) Input(1, product_name) Input(1, wholesale_cost) Input(1, dummy) Input(1, dummy) End While My CSV file (as text) looks like this: Customer Name,Phone Number,Username,Product,Wholesale Cost,Sales Price,Gross Profit, Customer Reference ,00000000000,00000000000,Product Name,25.00,35.00,10.00, ,00000000000,00000000000,Product Name,1.00,1

MySQL Invalid UTF8 character string when importing csv table

由 落爺英雄遲暮 提交于 2019-11-30 06:55:06
I want to import an .csv file into MySQL Database by: load data local infile 'C:\\Users\\t_lichtenberger\\Desktop\\tblEnvironmentLog.csv' into table tblenvironmentlog character set utf8 fields terminated by ';' lines terminated by '\n' ignore 1 lines; The .csv file looks like: But I am getting the following error and I cannot explain why: Error Code: 1300. Invalid utf8 character string: 'M' Any suggestions? Rick James See what the settings for the export were. Look for "UTF-8". This suggests that "Truncated text" is caused by the data not being encoded as utf8mb4. Outside MySQL, "look for "UTF

MySQL Invalid UTF8 character string when importing csv table

由 我怕爱的太早我们不能终老 提交于 2019-11-29 12:06:40
问题 I want to import an .csv file into MySQL Database by: load data local infile 'C:\\Users\\t_lichtenberger\\Desktop\\tblEnvironmentLog.csv' into table tblenvironmentlog character set utf8 fields terminated by ';' lines terminated by '\n' ignore 1 lines; The .csv file looks like: But I am getting the following error and I cannot explain why: Error Code: 1300. Invalid utf8 character string: 'M' Any suggestions? 回答1: See what the settings for the export were. Look for "UTF-8". This suggests that

Pandas csv-import: Keep leading zeros in a column

由 陌路散爱 提交于 2019-11-26 22:07:01
I am importing study data into a Pandas data frame using read_csv . My subject codes are 6 numbers coding, among others, the day of birth. For some of my subjects this results in a code with a leading zero (e.g. "010816"). When I import into Pandas, the leading zero is stripped of and the column is formatted as int64 . Is there a way to import this column unchanged maybe as a string? I tried using a custom converter for the column, but it does not work - it seems as if the custom conversion takes place before Pandas converts to int. baltasvejas As indicated in this question/answer by Lev
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