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% 第八章: 例 8.30 % 切比雪夫-2带阻滤波器设计 % CHEBY2函数的应用 % % 数字低通滤波器指标: % 切比雪夫-2型带阻: ws = [0.4*pi 0.7*pi]; % 数字阻带边缘频率 wp = [0.25*pi 0.8*pi];

% 第四章: 例 4.4: % 用 ztrans 求 X(z) % x(n) = (n-2)(0.5)^(n-2)cos[pi*(n-2)/3]u(n-2) x = 'n*((0.5)^n)*cos(pi*n/3)'; X = ztrans(x); [nX,dX] = numden(X); nX=expand(nX) dX = symmul(dX,'z^2'); dX=exp

% 第四章: 例 4.10: % 求不带复数的z反变换 % b = [1,0.4*sqrt(2)]; a=[1,-0.8*sqrt(2),0.64]; [R,p,C] = residuez(b,a) Mp=abs(p') % 极点的幅度 Ap=angle(p')/pi % 极点相角以 pi为单位 [delta,n]=impseq(0,0,6) x=filter(b,a,

% 第四章: 例4.13: % z-平面函数: % b) b = [1,0,-1]; a = [1,0,-0.81]; [R,p,C] = residuez(b,a); % d) w = [0:500]*pi/500; [H]=freqz(b,a,w); magH = abs(H);phaH = angle(H); subplot(2,1,1),plot(w/pi,magH)

public class Circle_area { public static void main(String args[]) { final float PI=3.14f;//final的作用？ float r=2.5f,area; // PI=3.1F;//error!!! area=PI*r*r;

The BLINKY project blinks the LEDs on the Phytec KC161RI and KC161PI evaluation boards. The BLINKY project allows you to test the Phytec KitCON-161RI+PI and C161RI+PI Starter Kits. It cont

REM COPY and RENAME Monitor Files REM REM set name of target system to "KC161RI+PI" COPY abstract.txt "..\Phytec KC161RI+PI.TXT" COPY boot167 "..\Phytec KC161RI+PI.BOT" COPY monitor "..

%微积分例1:一元函数求导（diff,gradient) clear;close; x=-2*pi:0.1:2*pi; y=sin(x); dy=diff(y)./diff(x); plot(x,y,x(1:length(x)-1),dy); hold on; yx =gradient(y,x); plot(x,yx,'ro');

function y=normal(x) y=(1/(2*pi)^0.5)*exp(-x.^2/2);

%微积分例1:一元函数求导（diff,gradient) clear;close; x=-2*pi:0.1:2*pi; y=sin(x); dy=diff(y)./diff(x); plot(x,y,x(1:length(x)-1),dy); hold on; yx =gradient(y,x); plot(x,yx,'ro');