csv file split error ","
1 view (last 30 days)
Show older comments
I have a csv file with 1.7 million rows and 37 columns. I want to split it into 2 csv files, 850k rows each.Please give me your advice.After the code I wrote, All appear in one column. Where am I doing wrong?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1270600/image.jpeg)
6 Comments
Rik
on 21 Jan 2023
I wrote that when I restored your edits on another thread.
Next time, please think before posting what parts you do not wish to share publicly. Since you published it, I'm still legally allowed to share the original post. Just remember next time that the internet doesn't easily forget.
Accepted Answer
Cris LaPierre
on 28 Oct 2021
It looks to me like the issue is that your column offset is 37.
- The column offset indicates the number of columns to skip before writing the numeric data. col is zero-based, so that col = 0 instructs MATLAB to begin writing in the first column of the destination file. Skipped columns are separated by commas.
By telling it to skip 37 columns, you get 37 commas with nothing between, and it starts writing the 38th column. However, you only have 37 columns of data, so the result is a csv file with nothing but commas. See here.
Try this instead
csvwrite('test.csv',stampstsextport,850000,0)
writematrix(stampstsexport(850000:end,:),'test.csv')
Also note that both of these examples will give you a single file. You would need to have code to create the file of the first 850k rows.
More Answers (0)
See Also
Categories
Find more on Interactive Control and Callbacks in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!