How to read\open a csv file with millions of rows and hundreds of coloumns to compare/delete and save
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Hi
i have csv files with millions of rows and hundreds of coloumns that i want to open\read in order to compare the files, remove duplicates and save the new file as csv also, and many other modifications..
when i used csvreader the PC stuck! so any help here
回答(1 个)
George
2016-8-12
fid = fopen('data.csv');
% your formatSpec will be very long because of the number of fields
formatSpec = '%s %s %f %d'; % reads a string, a string, a float, an integer
A = textscan(fid, formatSpec, 'HeaderLines', 1, 'Delimiter', ',');
fclose(fid);
csvread
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