csv

问题 Afternoon (or morning, evening) I am trying to merge several .csv files that have a similar layout, they have a class in one column ( character ) and an abundance ( num ) in another. When imported as a data.frame example would be: print(one[1:5,]) X Class Abundance_inds 1 1 Chaetognath 2 2 2 Copepod_Calanoid_Acartia_spp 9 3 3 Copepod_Calanoid_Centropages_spp 4 4 4 Copepod_Calanoid_Temora_spp 1 5 5 Copepod_Calanoid_Unknown 55 The class column ( number of rows and order ) changes every csv

问题 I am using Jupyter notebook and want to save csv file to cassandra db. There is no problem while getting data and showing it, But when I try to save this csv data to cassandra db it throws below exception. : org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 1.0 failed 1 times, most recent failure: Lost task 0.0 in stage 1.0 (TID 1, localhost, executor driver): java.lang.NoClassDefFoundError: com/twitter/jsr166e/LongAdder I dowloaded maven package manually both

问题 I have 100s of similar json files and I want to save the contents of these json files into one single csv file. This is the code I wrote for the same. But it's not doing what I want to do. Desired output is csv file: https://drive.google.com/file/d/1cgwdbnvETLf6nO1tNnH0F_-fLxUOdT7L/view?usp=sharing Please tell me what can be done to get the above output? Thanks JSON file format: https://drive.google.com/file/d/1-OZYrfUtDJmwcRUjpBgn59zJt5MjtmWt/view?usp=sharing list_=['politifact13565',

问题 I have tab separated csv files which I want to transform to xlsx. So each csv should be transformed to a xlsx. Filename should be the same. However, the files are tab separated. For example, see this test file screenshot: When I run my code (I created a subfolder xlsx before): Sub all() Dim sourcepath As String Dim sDir As String Dim newpath As String sourcepath = "C:\Users\PC\Desktop\Test\" newpath = sourcepath & "xlsx\" 'make sure subfolder xlsx was created before sDir = Dir$(sourcepath & "

问题 I have a set of csv files, one of them has a timestamp, all the other ones just have data, but they all have the same number of rows. The timestamp is in the 2nd column of the csv. I would like to append the timestamp to the first column of all csv files. This is currently working but when I try to close the files, I get an error. There can be 50-500 csv files, and each can have thousands of rows, so that is why I wonder if the close() is required. Also, can anyone suggest any ways of

问题 I'm trying out a project with ASP.Net MVC and have a large CSV file that I want to save to the LocalDB. I have been following this tutorial (and the ones before that are about MVC): https://docs.microsoft.com/en-us/aspnet/mvc/overview/getting-started/introduction/creating-a-connection-string Now I want to add data to this database that I have set up and I would like to read this data from a csv file and then save it to my database. I have tried this: https://www.aspsnippets.com/Articles

问题 I'm trying out a project with ASP.Net MVC and have a large CSV file that I want to save to the LocalDB. I have been following this tutorial (and the ones before that are about MVC): https://docs.microsoft.com/en-us/aspnet/mvc/overview/getting-started/introduction/creating-a-connection-string Now I want to add data to this database that I have set up and I would like to read this data from a csv file and then save it to my database. I have tried this: https://www.aspsnippets.com/Articles

问题 I am trying to read in a comma separated text file into Python with read_csv . However, Python is taking the header and shifting it over to the right by one. Data file example with less columns than I actually have: (example file with more data: https://www.dropbox.com/s/5glujwqux6d0msh/test.txt?dl=0) DAY,TIME,GENVEG,LATI,LONGI,AREA,CHEM 226, 1200, 2, -0.5548999786D+01, 0.3167600060D+02, 0.1000000000D+07, NaN 226, 1115, 2, -0.1823500061D+02, 0.3668500137D+02, 0.1000000000D+07, NaN If I try

问题 I want to import four .csv files - each with more than 300,000 rows and 150 columns and size over 0.5 GB - into a database table. What is the easiest way to do this in SQL Server? I am using the latest SQL Server 2017 Express. I have 4 large .csv files which I want to import it into a database. I was planning to import these into 4 separate tables. However, to create new table all the column names and datatypes are required to be defined which would be cumbersome. Hence I wanted to know how

问题 Hi i have used regular expression for validating email columns of csv file before insertion in php.but when i used regular expression or filter validate email function it always show emails in incorrect format although i have a correct email format in csv file.I want that it read a csv file and check email column in csv file and check its value i.e in email should be in correct format or not.If it is correct format then the data insert otherwise skip. 回答1: Use PHP FILTER_VALIDATE_EMAIL Filter