Linked Questions

I'm looking for robust code to solve the "Longest Common Substring" problem: Find the longest string (or strings) that is a substring (or are substrings) of two or more strings. I can just code it ...

I have a tab separated value file with 10 million rows each of which has three tab separated values. The first value is a string, the second an integer, and the third another string. How to read ...

I am handling large numerical data in Mathematica. In smaller problems everything worked fine using Export and Import with the ...

I have a very huge file (1GB) from which I desire to import only the 5th column. It is a tab delimited text file with a .txt extension. Can you please help me with ...

This question is in two related parts. The first is about dataset size, the second data wrangling. Part 1: I've built a naive Bayesian classifier on Mathematica. It uses ...

I am trying a read a file that's arranged such that there's alternating set of rows containing data that I don't need and data that I need. So for my case the first n lines in the files are useless to ...

I am calculating huge data files with an external program. I would like then to import the data into Mathematica for analysis. The files are 2 columns and up to many millions of rows. So for ...

I have a large text file of a million sections. Each section contains A lines of header and B lines of numeric data. I want to read the first and last line of B from each section (to have a list of 2 ...

I have a large data file (150 000 lines) which I want to import in Mathematica. The first few lines look like this ...

This question is related to the following: Speeding up Import and Export in CSV format Stream CSV or TSV files Reading periodic elements from a large file I have a set of very large CSV files (a ...

having here several files in ASCII format http://ge.tt/91rv0Jf/v/0 I want to import, while removing headers and footers and then join the several lists. ...

I would like to read in really large text files (about 2GB) into Mathematica. The structure of the file is such that the first row and the first column are text i.e strings. Rest is all numbers. Is it ...

As I have learned in this community, one way to import a hefty data files (e.g. millions of rows of {x1, y1} data) if you don't care about the individual elements (maybe just want to obtain some ...

I work with large data sets with 22 columns and up to a million rows. Each row contains one observation with several variables. All variables are numbers. Simplyfied example: 1, 1, 2, 3, 4, 5, 6,...

I have to import columns 1,2,3, and 6 from a long (2 * 10^5 rows) file with this structure: ...