matlab - CSVIMPORT function not working for huge CSV? -


so i'm using this csvimport function, , i'm trying import csv file looks this: 

    2014-6-06 08:03:19, 439105, 1053224, front entrance     2014-6-06 09:43:21, 439105, 1696241, main exit     2014-6-06 10:01:54, 1836139, 1593258, archway     2014-6-06 11:34:26, 845646, external, exit      2014-6-06 04:45:13, 1464748, 439105, side exit

and on 948739 lines. basically, columns 2 , 3 represent peoples' id numbers, , describes calls made 1 person @ event(ex. 439105 calls 1053224). whenever calls outside of event, id shows "external".

i need import columns 2 , 3(ex. 439105 & 1053224). problem can code work on small csv file size , not big one... , according this question, csv file on million lines worked.

according documentation:

[c1 c2 c3] = csvimport( filename, 'columns', {'c1', 'c2', c3'}, ... ) form returns data columns in output variables c1, c2 , c3 respectively, column names case-sensitive , must match column name in file exactly. when fetching data in column mode number of output columns must match number of columns read or must one. in latter case data columns returned single cell matrix.

[c1 c2 c3] = csvimport( filename, 'columns', [1, 3, 4], ,'noheader', true, ... ) form returns data columns in output variables c1, c2 , c3 respectively, columns parameter must contain column indices when 'noheader' option set true.

so used this: 

[c2 c3] = csvimport('hugecsv.csv','columns',2:3,'noheader',true)

using smaller test csv file, printed out this: 

    c2 =    439105   439105   439105   439105  1836139  1464748  1464748    c3 =   '1053224' '1696241' '580064' '1464748' 'external' '439105' '1053224'

which want. however, when actual file of 948739 lines, list of numbers, looks this: 

  439105   439105   439105   439105  1836139  1464748  1464748  1464748  1464748   580064   580064   580064   580064  1053224

and goes on quite while...

so doing wrong when calling csvimport? can't figure out... appreciated, thank you!!!


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