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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(:))])

x=[0:3*pi/2/200:3*pi/2]; y=cos(15*x); I=quadspln(x,y,0,3*pi/2) x0=[0:3*pi/2/1000:3*pi/2]; y0=cos(15*x0); y1=interp1(x,y,x0,'spline'); plot(x,y,x0,y1,':')

clear clc subplot(2,2,1), fplot('humps',[0 1]) subplot(2,2,2), fplot('abs(exp(-j*x*(0:9))*ones(10,1))',[0 2*pi]) subplot(2,2,3), fplot('[tan(x),sin(x),cos(x)]',2*pi*[-1 1 -1 1]) subplot(2,2,4), f

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

real*8 a, pai, pi_ a=1.d-307; print *, a, 1./a; print *, tiny(a), huge(a) b=1.e-39 ; print *, b, 1./b; print *, tiny(b), huge(b) pi =3.14159265358979_8 ; print *, pi ! pi 无双精度定义，仍为单精度。 a =3.

! ------求圆錐体积和表面积------ PROGRAM Example_1_2 REAL :: pi, r, h, v, s pi = 3.141593 PRINT *,'Input radius r and height h ?' READ *, r, h v = pi*h*r**2/3.0 s = pi*r*(r + sqrt(r**2 + h**2))