Append variables in mat file

Making a simple example, where I load a .mat file to append to a variable. How do I then save the .mat file again after the appending?

   current = [1 2 3];
   new_current = [4 7];
   volt = [7 5 4];
   save('data.mat','current','volt');
   data = load('data.mat');
   data.current = [data.current  new_current];

   save .matfile?!?!!

Answer 1

[ES]

save(FILENAME, ..., '-append') adds new variables to an existing file.

in your case,

save('data.mat','new_current','-append');

Answer 2

[Toke]

Hi.

Thanks for the answer but that is not what I want. I want to replace data.current with the new data.current I have made from:

   data.current = [data.current  new_current];

Answer 3

[erdinc]

current = [1 2 3];

new_current = [4 7];

volt = [7 5 4];

save('data.mat','current','volt');

load('data.mat','current');

current = [current new_current];

save(file,'current','-append')