read.csv

问题 What I Am Trying To Do My source file is very large and I want to avoid copying it into other folders. I decided to create a symlink to the large file and want to use read.csv to read in the file. Folder structure project1/data/source-file.csv project2/data/alias-to-source-file.csv What Went Wrong Reading in the source file works perfectly, but when I try to read in the symlink, I get the following error: line 1 appears to contain embedded nulls . I know that I can just duplicate the file and

问题 I want to import multiple TSV Files (yes: T SV) in R. Reading a single file with an selection of spacific columns works well by using: data00<-read.csv(file = '/Volumes/2018/06_abteilungen/bi/analytics/tools/adobe/adobe_analytics/adobe_analytics_api_rohdaten/api_via_data_feed_auf_ftp/beispiel_datenexporte_data_feed/01sssamsung4de_20180501-000000.tsv', sep ="\t", fill = TRUE, quote='', header = FALSE )[ ,c(287, 288, 289, 290, 291, 292, 293, 304, 370, 661, 662, 812, 813, 994, 995, 1002)] Now i

问题 This question already has answers here : Read a UTF-8 text file with BOM (2 answers) Closed 4 years ago . Sometimes a Byte Order Mark (BOM) is present at the beginning of a .CSV file. The symbol is not visible when you open the file using Notepad or Excel, however, When you read the file in R using various methods, you will different symbols in the name of first column. here is an example A sample csv file with BOM in the beginning. ID,title,clean_title,clean_title_id 1,0 - 0,,0 2,"""0 - 1

来源： https://stackoverflow.com/questions/53100599/applying-the-same-operations-on-multiple-csv-file-in-pandas

问题 I've recently updated to R 4.0.0 from R 3.5.1. The behaviour of read.csv seems to have changed - when I load .csv files in R 4.0.0 factors are not automatically detected, instead being recognised as characters. I'm also still running 3.5.1 on my machine, and when loading the same files in 3.5.1 using the same code, factors are recognised as factors. This is somewhat suboptimal. Any suggestions? I'm running Windows 10 Pro and create .csv files in Excel 2013. 回答1: As Ronak Shah said in a

问题 I've recently updated to R 4.0.0 from R 3.5.1. The behaviour of read.csv seems to have changed - when I load .csv files in R 4.0.0 factors are not automatically detected, instead being recognised as characters. I'm also still running 3.5.1 on my machine, and when loading the same files in 3.5.1 using the same code, factors are recognised as factors. This is somewhat suboptimal. Any suggestions? I'm running Windows 10 Pro and create .csv files in Excel 2013. 回答1: As Ronak Shah said in a

问题 I've recently updated to R 4.0.0 from R 3.5.1. The behaviour of read.csv seems to have changed - when I load .csv files in R 4.0.0 factors are not automatically detected, instead being recognised as characters. I'm also still running 3.5.1 on my machine, and when loading the same files in 3.5.1 using the same code, factors are recognised as factors. This is somewhat suboptimal. Any suggestions? I'm running Windows 10 Pro and create .csv files in Excel 2013. 回答1: As Ronak Shah said in a

问题 I'm currently trying to open a 48GB csv on my computer. Needless to say that my RAM does no support such a huge file, so I'm trying to filter it before opening. From what I've researched, the most appropriate way to do so in R is using the sqldf lib, more specifically the read.csv.sql function: df <- read.csv.sql('CIF_FOB_ITIC-en.csv', sql = "SELECT * FROM file WHERE 'Year' IN (2014, 2015, 2016, 2017, 2018)") However, I got the following message: Erro: duplicate column name: Measure As SQL is

问题 I need to read a text file (tab-separated) that has some carriage returns inside some fields. If I use read.table, it gives me an error: line 6257 did not have 20 elements If I use read.csv, it doesn't give an error, but creates a new line in that place, putting the next fields in the first fields of the new line. How can I avoid this? I can't alter the file itself (the script is to be run elsewhere). Also the broken strings don't have quotation marks (no strings in the file have). One option

问题 I need to read a text file (tab-separated) that has some carriage returns inside some fields. If I use read.table, it gives me an error: line 6257 did not have 20 elements If I use read.csv, it doesn't give an error, but creates a new line in that place, putting the next fields in the first fields of the new line. How can I avoid this? I can't alter the file itself (the script is to be run elsewhere). Also the broken strings don't have quotation marks (no strings in the file have). One option