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%Design a FIR filter with window function,Parameter:Wp=0.5*pi,Ws=0.66*pi,passband ripple rp:3dB,Stopband attenuation rs:30dB. %Assuming input signal:f1=3Hz,f2=20Hz,sample frequency:50Hz. clear; w

% feedbl.m % 反馈线性化 % 初始化 clear X1 = [rand(1,300)*pi, rand(1,100)*pi]; X2 = [rands(1,300)*pi, zeros(1,100) ]; P = [X1; X2]; dt = 0.05; T= X2 + dt*(10*sin(X1)-2*(X2)); [R,Q] = size(P); S1

%例24-17 设置坐标轴 %Ex24-17 set axis close all subplot(1,3,1) ezsurf(@(t,s)(sin(t).*cos(s)),@(t,s)(sin(t).*sin(s)),@(t,s)cos(t),[0,2*pi,0,2*pi]) axis auto;title('auto') subplot(1,3,2) ezsurf(@(t,s)(

%例23-20 文本框标注 x=0:0.02*pi:2*pi; y=sin(x)+cos(x); plot(x,y,pi,sin(pi)+cos(pi),'o') text(pi,sin(pi)+cos(pi),['sin(\pi)+cos(\pi)=',num2str(sin(pi)+cos(pi))]) gtext({'gtext1-line1','gtext1-line2'})

%例23-5 曲线格式和标记点类型设置 x=0:0.1*pi:2*pi; y3=sin(x).*cos(3*x); y1=sin(x); y2=cos(3*x); plot(x,y1,'ob',x,y2,'--dc',x,y3,':vr') %第一组数据只标记数据点

%例23-18 图例 x=0:0.02*pi:2*pi; y1=sin(x); y2=cos(x); y3=sin(3*x).*cos(x); plot(x,[y1;y2;y3]) axis([0 2*pi -1.5 1.5]) set(gca,'XTick',[0 pi 2*pi],'XTickLabel',{'0','pi','2pi'}) legend('sin(x)','c

%例23-36 函数绘图 subplot(2,2,1) fplot(@sin,[0 2*pi]) title('y=sin(x)') subplot(2,2,2) f='cos(x)+sin(3*x)'; ezplot(f,[-2*pi 2*pi -3 3]) title('y=cos(x)+sin(3x)') subplot(2,2,3) ezpolar('2+3*sin(t)

%例23-12 双纵轴绘图 t=0:0.02*pi:7; x=cos(t); y=exp(t); [ax,ha,hb]=plotyy(t,x,t,y) %句柄都是一些小数数值，用于标识各个对象 set(ax(1),'XTick',[0 pi 2*pi],'XTickLabel',{'0','pi','2pi'}) set(ha,'LineStyle','--','Color','r')

#include "stdio.h" #include "13kfft.c" #include "math.h" main() { int i,j; double pr[64],pi[64],fr[64],fi[64]; for (i=0; i

thi=[1:0.1:180]*pi/180; dthi=thi(2)-thi(1); Le=length(thi); N=10; kd=2*pi*9/40; beta=11/20*pi; F=zeros(1,Le); U0=0; Nor=1/N*sin(pi/2)/sin(pi/(2*N)); for i=1:Le %numerator Nu=sin(N/2