clear;
c=100;
fc=26e6;
Tr=2.61e-6;
N=10;
Dt=1/（c*fc）;
t1=0:Dt:（N*Tr-Dt）;
for?i=1:N;
????t2_t=（i-1）*Tr:Dt:（i*Tr-Dt）;
????t2（（i-1）*length（t2_t）+1:i*length（t2_t））=t2_t;
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????100??2011-11-11?01:00??Untitled2.m

?????文件????????320??2012-03-23?07:18??Untitled3.m

?????文件?????????98??2011-11-11?01:20??Untitled4.m

?????文件????????993??2012-03-03?22:58??Untitled5.m

?????文件????????179??2012-03-23?07:23??Untitled1.m

-----------?---------??----------?-----??----

?????????????????1690????????????????????5