作业帮w=[-9.9:0.1:9.9]+1e-10;matlab中加这个+1e-10,这条语句又怎么理解?set(gcf,'color','w') % 置图形背景色为白N=6; nmax=20; n=0:nmax; x=[ones(1,N),zeros(1,nmax+1-N)]; % 给出输入序列w=[-9.9:0.1:9.9]+1e-10;X=(sin(N*w/2)./sin(w/2)).*e
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![w=[-9.9:0.1:9.9]+1e-10;matlab中加这个+1e-10,这条语句又怎么理解?set(gcf,'color','w') % 置图形背景色为白N=6; nmax=20; n=0:nmax; x=[ones(1,N),zeros(1,nmax+1-N)]; % 给出输入序列w=[-9.9:0.1:9.9]+1e-10;X=(sin(N*w/2)./sin(w/2)).*e](/uploads/image/z/9828295-7-5.jpg?t=w%3D%5B-9.9%3A0.1%3A9.9%5D%2B1e-10%3Bmatlab%E4%B8%AD%E5%8A%A0%E8%BF%99%E4%B8%AA%2B1e-10%2C%E8%BF%99%E6%9D%A1%E8%AF%AD%E5%8F%A5%E5%8F%88%E6%80%8E%E4%B9%88%E7%90%86%E8%A7%A3%3Fset%28gcf%2C%27color%27%2C%27w%27%29+%25+%E7%BD%AE%E5%9B%BE%E5%BD%A2%E8%83%8C%E6%99%AF%E8%89%B2%E4%B8%BA%E7%99%BDN%3D6%3B+nmax%3D20%3B+n%3D0%3Anmax%3B+x%3D%5Bones%281%2CN%29%2Czeros%281%2Cnmax%2B1-N%29%5D%3B+%25+%E7%BB%99%E5%87%BA%E8%BE%93%E5%85%A5%E5%BA%8F%E5%88%97w%3D%5B-9.9%3A0.1%3A9.9%5D%2B1e-10%3BX%3D%28sin%28N%2Aw%2F2%29.%2Fsin%28w%2F2%29%29.%2Ae)
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w=[-9.9:0.1:9.9]+1e-10;matlab中加这个+1e-10,这条语句又怎么理解?set(gcf,'color','w') % 置图形背景色为白N=6; nmax=20; n=0:nmax; x=[ones(1,N),zeros(1,nmax+1-N)]; % 给出输入序列w=[-9.9:0.1:9.9]+1e-10;X=(sin(N*w/2)./sin(w/2)).*e
w=[-9.9:0.1:9.9]+1e-10;matlab中加这个+1e-10,这条语句又怎么理解?
set(gcf,'color','w') % 置图形背景色为白
N=6; nmax=20; n=0:nmax;
x=[ones(1,N),zeros(1,nmax+1-N)]; % 给出输入序列
w=[-9.9:0.1:9.9]+1e-10;
X=(sin(N*w/2)./sin(w/2)).*exp(-j*(N-1)*w/2); % 进行 DTFT,给出频谱序列（关键语句）
subplot(2,2,1),stem(n,x,'.') % 画出输入序列
这个程序为什么要加+1e-10?
w=[-9.9:0.1:9.9]+1e-10;matlab中加这个+1e-10,这条语句又怎么理解?set(gcf,'color','w') % 置图形背景色为白N=6; nmax=20; n=0:nmax; x=[ones(1,N),zeros(1,nmax+1-N)]; % 给出输入序列w=[-9.9:0.1:9.9]+1e-10;X=(sin(N*w/2)./sin(w/2)).*e
[-9.9:0.1:9.9]这个数组每个数加上1*10^(-10)
避免出现除数为0的情况