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

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..!!

Answer 1

[Andreas]

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