代码搜索：Raspberry Pi
找到约 10,000 项符合「Raspberry Pi」的源代码
代码结果 10,000
www.eeworm.com/read/275630/10806665
m dm13502.m
%dm13502
%计算离散系统频率响应并绘制其幅频和相频特性曲线
num=[1/4 1/4];
den=[1 -1/2];
[H,w]=freqz(num,den);
Hm=abs(H);
Hp=angle(H)*180/pi;
w=w/pi
plot(w,Hm)
title('离散系统幅频特性曲线')
xlabel('\theta/\pi');
yl
www.eeworm.com/read/275630/10806679
m dm10201.m
% dm10201
% 门信号的傅里叶变换
syms t w ; %定义符号变量
ut = sym('Heaviside(t+0.5)-Heaviside(t-0.5)'); %借助阶跃函数定义门函数
subplot(211);
ezplot(ut);
www.eeworm.com/read/275630/10806685
m dm07102.m
%dm07102
%利用符号运算绘制连续信号时域波形
syms t
f=sym('1+cos(t)') %定义符号表达式
ezplot(f,[-pi,pi]) %绘制符号表达式波形
set(gcf,'color','w') %设置当前图形背景颜色为白色
www.eeworm.com/read/275630/10806698
m dm07204.m
%dm07204
%绘制正弦信号时域波形
syms w t
f=sym('3*sin((w)*t)') %定义符号表达式
f1=subs(f,'w','pi/2') %变量替换
ezplot(f1,[0,4*pi]) %绘制波形
pause
f2=subs(f,'w','pi')
ezplo
www.eeworm.com/read/420195/10811083
m sint.m
t=0:pi/32:2*pi; %取64点
innum=127.5*cos(t)+127.5; %幅值取0-255
%(1)fix(x) : 截尾取整.
%>> fix( [3.12 -3.12])
%ans =
% 3 -3
%(2)floor(x):不超过x 的最大整数.(高斯取整)
%>> floor( [3.12 -3.12])
%ans =
%
www.eeworm.com/read/420193/10811092
m fft_lisanfuliyebianhuan.m
%对连续的单一频率周期信号 按采样频率fs=8fa 采样，截取长度N分别选N =20和N =16，观察其DFT结果的幅度谱。
%解 :此时离散序列x(n)=sin(2*pi*nfa/fs)=sin(2pi*n/8)，即k=8。用MATLAB计算并作图，函数fft用于计算离散傅里叶变换DFT，程序如下
k=8;
n1=[0:1:19];
xa1=sin(2*pi*n1/k)
www.eeworm.com/read/349586/10815777
m c5_4_1.m
clear all;
clf;
N=1224;
f1=200;
f2=700;
f3=1100;
dt=1/1024;
sample=1/dt;
randn('state',sum(100*clock));
dis=2*rand(1,
www.eeworm.com/read/420098/10817175
m plotcbar.m
% PLOTCBAR -- Plot colorbar for current colormap.
%
% PLOTCBAR is a script to plot a (vertical) colorbar for the
% current colormap in figure 1. and saves it to a level 1 encapsulated
% postscri
www.eeworm.com/read/419873/10832981
m figure_7_pll.m
%--------------------------------------------------------------------------
% Copyright (C) Darius Plausinaitis
% Written by Darius Plausinaitis
%---------------------------------------------------