How do I manipulate a column in a data file ??

I have a data file with 10 columns and 28380 rows. I want to manipulate only the 7th column and reassign the values to the data. How do I do it ??

[TastyPastry]

What kind of data file is it? .xlsx, .csv, etc.?

Answer 1

[dpb]

If it is an ASCII data file, then read the file, do the computation(s) on the column in question and rewrite it.

If it were an Excel file you could use xlsread|xlswrite to read the specific column but there's not a general way to write a portion of a text file.