代码搜索结果

x0=[0,0.4,1 2,pi]; y0=sin(x0); sp=csapi(x0,y0), fnplt(sp,':'); hold on, ezplot('sin(t)',[0,pi]); plot(x0,y0,'o') sp.coefs

syms t; f=t*(t-pi)*(t-2*pi); [A,B,F]=fseries(f,t,12,0,2*pi); ezplot(f,[0,2*pi]); hold on; ezplot(F,[0,2*pi]) F1=fdiffint(A,B,t,0.25,0,2*pi); ezplot(F1,[0,pi]); hold on F1=fdiffint(A,B,t,0.5,0,2*p

ezplot('x*sin(10*pi*x)+2',[-1,2]) f=inline('-x.*sin(10*pi*x)-2','x'); v=[]; for x0=[-1:0.8:1.5,1.5:0.1:2] x1=fmincon(f,x0,[],[],[],[],-1,2); v=[v; x0,x1,f(x1)]; end [a,b,c,d]=gaopt([-1,2]

syms x y z int(int(int(4*x*z*exp(-x^2*y-z^2),x,0,2),y,0,pi),z,0,pi) vpa(ans,60)

syms t; f=exp(-t)*sin(3*t+1); ezplot(f,[0,pi]); hold on [A1,B1,F1]=fseries(f,t,10,0,pi); ezplot(F1,[0,pi]); [A2,B2,F2]=fseries(f,t,15,0,pi); ezplot(F2,[0,pi]); [A3,B3,F3]=fseries(f,t,20,0,pi); ezpl

x0=-2*pi:0.01:2*pi; y0=sin(x0); syms x; y=sin(x); plot(x0,y0), axis([-2*pi,2*pi,-1.5,1.5]); hold on for n=[8:2:16] p=taylor(y,x,n), y1=subs(p,x,x0); line(x0,y1) end

x=[0,0.4,1 2,pi]; y=sin(x); sp1=csapi(x,y); a=fnint(sp1,1); xx=fnval(a,[0,pi]); xx(2)-xx(1) sp2=spapi(5,x,y); b=fnint(sp2,1); xx=fnval(b,[0,pi]); xx(2)-xx(1) ezplot('-cos(t)+2',[0,pi]); hold on

f=inline('2/sqrt(pi)*exp(-x.^2)','x'); f=inline('2/sqrt(pi)*exp(-x.^2)','x'); y=quad(f,0,1.5) % 用 inline 函数定义被积函数 y=quad('c3ffun',0,1.5) % 用 m 函数定义被积函数 syms

t=0:.2:2*pi; y=sin(t); % 先生成绘图用数据 subplot(2,2,1), stairs(t,y) % 分割窗口，在左上角绘制阶梯曲线 subplot(2,2,2), stem(t,y) % 火柴杆曲线绘制 subplot(2,2,3), bar(t,y) % 直方图绘制 subplot(2,2,4), semilogx(t,y) % 横坐标为对数的曲线

t=0:0.03:2*pi; y=sin(t.^2); plot(t,y) a=1:32; Z=cwt(y,a,'mexh','plot'); % 绘制绝对值图 surf(t,a,Z); shading flat; axis([0 2*pi,0,32,min(Z(:)) max(Z(:))])