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Raspberry Pi 的代码
e0642.m
n=10;dt=2*pi/n;t=0:dt:2*pi;
x=sin(t);y=cos(t);fill3(t,x,y,'c');
fesin.m
function f=fesin(x)
f=exp(-0.5*x).*sin(x+pi/6);
examp10_34.m
t=0:0.01:pi; y=sin(3*t+1); y1=3^0.75*sin(3*t+1+0.75*pi/2);
y2=glfdiff(y,t,0.75); plot(t,y1,t,y2)
examp2_4.m
v1=0: 0.2: pi % 注意，最终取值为 3 而不是 pi
v2=0: -0.1: pi % 步距为负，显然不能生成向量，故得出空矩阵
v3=0:pi % 取默认步距1
v4=pi:-1:0 % 逆序排列构成新向量
examp2_24.m
theta=0:0.01:6*pi; rho=5*sin(4*theta/3); polar(theta,rho)
rho=5*sin(theta/3); polar(theta,rho)
examp5_2.m
syms x w; f=x^2*exp(-2*x)*sin(x+pi);
F=laplace(f,x,w)
ilaplace(F)
ex0405.m
%用plot(x1,y1,x2,y2,…)绘制多条曲线
x=0:0.1:2*pi;
plot(x,sin(x),x,cos(x),x,sin(3*x)) %画三条曲线
sinc.m
function y=sinc(x)
% 函数 y=sinc(x)=sin(pi*x)./(pi*x)
% -----------------------
x = x + eps;
y = sin(pi*x) ./ (pi*x);
ideal.m
function hd = ideal(w,N)
a=(N-1)/2;
n0=[0:(N-1)];
m=n0-a+eps;
hd=sin(w*m)./(m*pi);
fesin.m
function f=fesin(x)
f=exp(-0.5*x).*sin(x+pi/6);