What's the fastest way to merge multiple csv files by column?

Question

I have about 50 CSV files with 60,000 rows in each, and a varying number of columns. I want to merge all the CSV files by column. I\'ve tried doing this in MATLAB by transposing

Answer 1

[...] transposing each csv file and re-saving to disk, and then using the command line to concatenate them [...]

Sounds like Transpose-Cat-Transpose. Use paste for joining files horizontally.

paste -d ',' a.csv b.csv c.csv ... > result.csv