adding integers in notepad

i have a notepad data.dat ..there are many integers in it seperated by commas, I have to sum the elements ..

is this an efficient way

Z=csvread('data.dat')
a=sum(Z)

Answer 1

[Walter Roberson]

Better would be sum(Z(:))

But if you want efficiency then you should skip the csvread layer, which would (for your purposes) just call the dlmread layer, which in turn would use testscan:

fid = fopen('data.dat','rt');
R = textscan('%f', 'Delimiter', ',');
fclose(fid);
a = sum(sum(cell2mat(R)));