Matlab绘图示例

Smartk

matlab下绘图的简单示例
& _/ K# E% e( E$ g; Q8 Y9 ^
2 P# w0 i' y9 n' c: v( v示例一（用plot同时绘制两条曲线）

x=0:0.01:2*pi
plot(x,sin(x),'green')
hold on
* z* i$ x; T! a4 v8 J3 _plot(x,sin(2*x),'red')
% o. k8 a5 w% K0 c
示例二（用stem绘制多个序列）
, R; B- f3 M6 \% O
n=0:50;
A=444.128;
a=50*sqrt(2.0)*pi;
1 T- t' ?9 f- X) j7 _( Z* _T=0.001;
w0=50*sqrt(2.0)*pi;
x=444.128*exp(-a*n*T).*sin(w0*n*T);
X=fft(x);
% Draw x,abs(X),angle(X)
9 \. v" {1 _* p4 l4 Ihold on
( L  d* c' @. H1 kstem(x)
- r- b) X2 P4 L  O% c' Astem(abs(X),'fill','r-.')
! |; d6 @% J0 z1 I, L1 ]9 istem(angle(X),'fill','g-.')
1 R  |8 {( q' \) r9 r
- |/ r" W( W* @9 |( W  O示例三（从复平面看幅频特性）

/ k& G; W! @+ A1 l$ }' h/ ?( Ith = (0:127)/128*2*pi;
x = cos(th);
y = sin(th);
- N$ U, z! }* Z6 t: M0 Nf = abs(fft(ones(10,1),128));
stem3(x,y,f','d','fill')
6 E$ w! z' Q% t  zview([-65 30])
xlabel('Real')
ylabel('Imaginary')
zlabel('Amplitude')

TI

tle('Magnitude Frequency Response')
1 H) @* O( Q: \, l  Q. e" \# krotate3d on

/ Y' p' i7 k/ t; U3 m4 ]# ?' h

CCxiaom

没有效果图，缺点