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Re: help! to input data...
Posted:
Jun 16, 1996 2:12 AM


In article <4pit53$jk5@dragonfly.wolfram.com>, tcdoe+@pitt.edu says... > >well, silly me. >I thought i was pretty good at the basics of mathematica, but today i >tried to input some numerical data that was comma delimited. i.e. > >456,45,21,0,5 >43,25,3,66,65 >... >... >... > >it is a large data file (10Mb+) with 5 numbers per line. i can't >convert the commas to tabs easily.
You don't need to convert the commas to tabs.
Solution #1: Open the file and put a "{" before the first number and a "}" after the last. This creats one big list and can be read in using something like data = <<"C:\\temp\\data.txt";
Solution #2: Load the file into MS Word and insert "{{" before the first number and add a "}}" after the last. Do a global search and replace of the paragraph character with "},^P{" where ^P is the paragraph character. This creats an array and can be read in using something like data = <<"C:\\temp\\data.txt"; This preserves the structure of the data file, the first line of data becomes record #1 data[[1]], the second number of the fifth record is data[[5,2]]. You may need to clean up the end of the file with your work processor.
I know there are ways to read almost anything in using ReadList but quickly editing my data files with Excel and Work is a very fast and easy to remember way to fix data access in Mathematica.



