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%《MATLAB及其在理工课程中的应用指南》(十一五规划版)第五章例5-2-2b程序 % 椭圆的直角坐标绘图 % 西安电子科技大学出版社出版 陈怀琛编著 2007年7月 % clear,clf figure(1) x=linspace(-pi,pi,1001); y1=2*sqrt(1-x.^2/3^2); y2=-2*sqrt(1-x.^2/3^2); plot(x,[y1

% Program 3-3 % hrollfcoef.m % % Generate coefficients of Nyquist filter % % programmed by H.Harada % function [xh] = hrollfcoef(irfn,ipoint,sr,alfs,ncc) %****************** variables ****

function shili05 h0=figure('toolbar','none',... 'position',[200 150 450 250],... 'name','实例05'); t=0:pi/10:2*pi; [x,y]=meshgrid(t); subplot(2,2,1) plot(sin(t),cos(t)) axis equal sub

function shili06 h0=figure('toolbar','none',... 'position',[200 150 450 400],... 'name','实例06'); t=0:pi/10:2*pi; h=plot(t,sin(t)); xlabel('t=0到2\pi','fontsize',16); ylabel('sin(t)','fon

% script that generates the figure 3.4 of Carrier modulation chapter snrindB=0:0.25:18; for i=1:length(snrindB), snr=10^(0.1*snrindB(i)); P2(i)=Qfunct(sqrt(2*snr)); P4(i)=2*Qfunct(sqrt(4*sn

% il3_8fun.m function f=il3_8fun(x,p) f=1/sqrt(2*pi)*exp((-(x-p).^2)/2).*log2(2./(1+exp(-2*x.*p)));

% lmin.m - find locations of voltage minima and maxima % % Usage: [lm,Zm] = lmin(ZL,Z0,type) % [lm,Zm] = lmin(ZL,Z0) (equivalent to type='min') % % ZL = load impedance % Z0 = lin

% dslab.m - solves for the TE-mode cutoff wavenumbers in a dielectric slab % % Usage: [u,v] = dslab(R,Nit) % [u,v] = dslab(R) (equivalent to Nit=3) % % R = frequency radius = k0*a*N

% fcs.m - Fresnel integrals C(x) and S(x) % % Usage: F = fcs(x) % % x = vector or matrix of real numbers % F = C(x) - jS(x) of same size as x % % notes: F(x) = C(x) - j*S(x) = int_0^x exp(-j*p

b=sym('pi') %创建符号常量 c1=sym(2/3,'d') %创建符号常量2/3，并返回最接近的32位的十进制数值 c2=sym(2/3,'f') %创建符号常量2/3，并返回该符号值最接近的浮点表示 c3=sym(2/3,'r') %创建符号常量2/3，并返回该符号值最接近的有理数型 c4=sym(2/3,'e')