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单位样本序列
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- clc
- clear
- close all
- n1 = 0;
- n2 = 5;
- n0 = 3;
- n = [n1:n2];
- x = [(n - n0) == 0];
- stem(n,x,'filled');
- ylim([-1,2]);
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0 I* c) g1 t& ?1 G. v( \2 `改成一个函数：
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- function [x,n]=delta(n0,n1,n2);
- % generate x(n) = delta(n - n0); n1 <= n <= n2
- %_____________________________________________
- %[x,n] = delta(n0, n1, n2);
- %
- n = [n1:n2];
- x = [(n-n0) == 0];4 A% X2 ]1 l9 M" C+ `+ M
) ?4 c& j2 p/ F. ]命名为delta.m7 w4 O4 [. I7 r* }" m9 H$ D
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新建一个脚本：# p. e1 i0 H$ Y9 I( {
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- n0 = 3;
- n1 = -3;
- n2 = 6;
- [x,n] = delta(n0,n1,n2);
- stem(n,x,'filled');
- ylim([-1,2]);
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& g- S/ r. I: n: C8 l: e' c运行得到：2 F/ P! k5 N# g& e* M& M; b; {
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单位阶跃序列
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5 m0 H$ K9 y3 ?/ }9 {7 t直接写成函数形式吧：
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- function [x,n]=stepseq(n0,n1,n2);
- % generate x(n) = u(n - n0); n1 <= n <= n2
- %_____________________________________________
- %[x,n] = stepseq(n0, n1, n2);
- %
- n = [n1:n2];
- x = [(n-n0) >= 0];1 S4 @& u! i: ^
, a4 k! N3 @; A" p( O! ~+ e新建一个脚本，测试：7 f% c9 n5 o! G$ h) J" }
' @* x, \" V- P5 E! E- clc
- clear
- close all
- n0 = 3;
- n1 = -3;
- n2 = 6;
- [x,n] = stepseq(n0,n1,n2);
- stem(n,x,'filled');
- ylim([-1,2]);8 K# ]$ T- H+ k4 J
! M% Q6 W8 ~1 Y0 f结果：
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实值指数序列- e7 R$ \4 s6 k9 c% T9 q- v1 K6 m( Y
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为一般形式。
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4 H9 o( Z, h2 T. s" @8 ]6 Z下面产生一个序列：5 l$ O9 |1 v; _6 i
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脚本代码：+ b+ U- S- P X* A: x6 U
; q7 N& \3 |- [( k. x, G4 \2 a4 k- clc
- clear
- close all
- n = -3:10;
- x = 0.9.^n;
- stem(n,x,'filled');
- xlabel('n');
- ylabel('0.9^n');
- xlim([-5,13]);
- ylim([0,2]);
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复指数序列
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- clc
- clear
- close all
- n = 0:10;
- x = exp( (2+3j)*n );
- stem(n,x);
- xlabel('n');
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周期序列. \1 a4 V4 j- ]
2 D3 V! X+ M, m3 g% ?. H- clc
- clear
- close all
- n = 0:10;
- x = exp( (2+3j)*n );
- subplot(2,1,1)
- stem(n,x);
- xlabel('n');
- title('Not Period Sequence');
- % the number of period
- P = 5;
- xtilde = x' * ones(1,P);
- xtilde = xtilde(：）';
- subplot(2,1,2);
- stem(xtilde);
- title('Period Sequence');
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发表于 2020-1-2 10:49
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淘帖
支持！
反对！