信号与系统与maltab求用matlab画出矩形信号 x(t)=u(t)-u(t-2)

wewwqqee

如题
求用matlab画出矩形信号  x(t)=u(t)-u(t-2)

' D' \3 ^4 G2 \% |( ]

wushy32

这个貌似很简单吧。。。

ononsiiii532

单位阶越：
* d9 ^6 l+ b. K3 z( A% c& Q) vfunction [x,n] = stepseq(n0,n1,n2)
3 Z6 n. H0 e2 {# V) A! R% Generates x(n) = u(n-n0); n1 <= n,n0 <= n2
, _/ i8 t* q# ^) }' t  C, _% ------------------------------------------
: Z! B8 L5 |. J% [x,n] = stepseq(n0,n1,n2)
%
3 r; j' _& m1 @3 |( h' ?if ((n0 < n1) | (n0 > n2) | (n1 > n2))
& ]) b; b8 Z$ _0 ?6 r7 S* e        error('arguments must satisfy n1 <= n0 <= n2')
end
n = [n1:n2];
, Q# r. g, r: T# Q/ R- Z%x = [zeros(1,(n0-n1)), ones(1,(n2-n0+1))];
( Z5 F# X! c9 b! T: ^2 D5 k) ^3 \x = [(n-n0) >= 0];