Rather than looping through each value in sig_time, loop through the cycles (i.e. array columns):
Period = 0;
for i = 1:Cycles
subset = sig_time(Period <= sig_time & sig_time < Period+6); % all values in sig_time between Period and Period+6
Sig_Vec(1:length(subset),i) = subset;
Period = Period+6;
end
You may prefer to go with the cell array so you don't have to deal with the NaN values:
Sig_Vec = cell(1,Cycles);
Period = 0;
for i = 1:Cycles
Sig_Vec{i} = sig_time(Period <= sig_time & sig_time < Period+6);
Period = Period+6;
end
but of course that means you have to deal with cells.
