How to append data or values to an existing .csv file??

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Manoj Murali
Manoj Murali 2012-2-10
hi..suppose i have a .csv file named csvfile.csv.And it has the values as follows:
23 45
69 84
48 78
12 34
so it has two colums.Now wat i need to do is to add values staring from the 3rd colum with out deleting the values in the 1st and 2nd colums..How can i do this...??Any one plz help..!!

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回答（1 个）

Andreas
Andreas 2012-2-14
Hi,
try to read your .csv file (which is actually NOT a Comma Separated Values file) with
OldData = dlmread('csvfile.csv', ' '); (BLANK as delimiter)
Assuming your new data is NewData = [1 2 3 4], you can save/overwrite the file with
dlmwrite('csvfile.csv',[OldData NewData'], ' ');
Regards, Andreas

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