Question

How to save this data (i and a) to a .txt file or .xls file in MATLAB?

for i=1:10
   i
   a=i*2
end

Answer 1

Use csvwrite to write coma separated values to a text file. You can read it in Excel, and it is a text file at the same time

i=1:10;
a=i*2;
csvwrite('data.csv', [i; a]);