In that loop you are making 101 files, each with exactly the same data in them. I doubt this is what you want to do!
Are you just trying to save the variable for later use in MATLAB? If so, simply do this
save('MyData','x','time','current')
Then later when you want to use the data do this:
DAT = load('MyData');
Then DAT will be a struct with the fieldnames equal to your variables. For example:
clear all
t = 0:.01:100; % Create some variables.
x = sin(t);
% Now we are going to save these, the load and plot to check.
save('Mydata','x','t')
clear all % Now we clear out the workspace.
DAT = load('Mydata');
plot(DAT.t,DAT.x)
If you want to save only part of the data, simply do this:
clear all
t = 0:.01:100; % Create some variables.
x = sin(t);
% downsample the data
tn = t(1:2:end);
xn = x(1:2:end);
save('Mydat','tn','xn')
