代码搜索结果

找到约 10,000 项符合 Raspberry Pi 的代码

besselshixian.m

%用零阶bessel函数近似描述圆阵的指向性(必须满足条件:N>=4*pi*r/lamda+2) clear all; close all; N=60; alpha=2*pi/N; c=1500; f=1500; lamda=c/f; r=lamda/0.4; x=0:pi/180:pi; y1=4*pi*r/lamda*sin(x/2); z1=bessel(0,y1)

show_tan.c

#include #include void main(void) { double pi = 3.14159265; printf("Tangent of pi is %f\n", tan(pi)); printf("Tangent of pi/4 is %f\n", tan(pi / 4.0)); }

ex0425.m

%用罗盘图和羽毛图绘制复向量 theta=0:0.2:2*pi; z=sin(theta).*exp(j*theta); compass(z) feather(z)

ex0413.m

%用plot3三维曲线绘图 x=0:0.1:20*pi; plot3(x,sin(x),cos(x)) %按系统默认设置绘图

ex0412.m

%在图形中用ginput将点的坐标取出,并用gtext写字符串 x=0:0.1:2*pi; plot(x,sin(x)) [m,n]=ginput(2) %取两点坐标 gtext('2\pi') %写2π

ex0410.m

%在图形窗口中添加文字标注 x=0:0.1:2*pi; plot(x,sin(x)) hold on plot(x,cos(x),'ro') title('y1=sin(x),y2=cos(x)') %添加标题 xlabel('x') %添加横坐标名 legend('sin(x)','cos(x)',4) %添加图例 text(pi,sin(pi),'x=\p

ex0422.m

%使用几种命令绘制离散数据 x=0:0.1:2*pi; y=sin(x).*exp(-2*x); subplot(3,1,1) stem(x,y,'filled') %画火柴杆图 subplot(3,1,2) stairs(x,y) %画阶梯图 subplot(3,1,3) scatter(x,y) %画点图

ex0316.m

%求符号表达式的积分 f=sym('cos(x)'); int(f) %求不定积分 int(f,0,pi/3) %求定积分 int(f,'a','b') %求定积分 int(int(f)) %求多重积分 syms t x g=[2*x t^2;t*sin(x) exp(x)] %创建符号矩阵 int(g) %对x求不定积分 int(g,'t') %对t求不定积分

hrollfcoef.m

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