怎样用MATLAB画阶跃函数的傅里叶变换后的图像？ syms t w ut=heaviside(t) UT=fourier(ut) 接下来该怎么写 怎么用MATLAB画出阶跃信号
\u9636\u8dc3\u51fd\u6570\u7684\u8868\u793a\u65b9\u6cd5 \u7528MATLAB \u753b\u56fe~~~\u53ef\u4ee5\u8fd9\u6837\u753b\uff1a
for i=1:1000
t(i)=0.01*i-5;
if t(i)<=0
y(i)=0;
else
y(i)=1;
end
end
plot(t,y);
axis([-5,5,-1,2]);
grid;
\u8fd8\u53ef\u4ee5\u5728simulink\u4e2d\uff0c\u4e00\u4e2a\u9636\u8dc3\u51fd\u6570\uff0c\u901a\u8fc7scope\u89c2\u5bdf\uff1b
\u3000\u3000\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\u7684\u5b9a\u4e49\u4e3a
\u3000\u3000\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\u662f\u4fe1\u53f7\u5206\u6790\u7684\u57fa\u672c\u4fe1\u53f7\u4e4b\u4e00\uff0c\u5728\u4fe1\u53f7\u4e0e\u7cfb\u7edf\u5206\u6790\u4e2d\u6709\u7740\u975e\u5e38\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u901a\u5e38\uff0c\u6211\u4eec\u7528\u5b83\u6765\u8868\u793a\u4fe1\u53f7\u7684\u5b9a\u4e49\u57df\uff0c\u7b80\u5316\u4fe1\u53f7\u7684\u65f6\u57df\u8868\u793a\u5f62\u5f0f\u3002\u4f8b\u5982\uff1a\u53ef\u4ee5\u7528\u4e24\u4e2a\u4e0d\u540c\u5ef6\u65f6\u7684\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\u6765\u8868\u793a\u4e00\u4e2a\u77e9\u5f62\u95e8\u4fe1\u53f7\uff0c\u5373
\u3000\u3000\u5728MATLAB\u4e2d\uff0c\u53ef\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u5f97\u5230\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\uff0c\u4e0b\u9762\u5206\u522b\u4ecb\u7ecd\u4e3b\u8981\u7684\u51e0\u79cd\u3002
\u3000\u3000\u8c03\u7528Heaviside(t)\u51fd\u6570
\u3000\u3000\u5728MATLAB\u7684Symbolic Math Toolbox \u4e2d\uff0c\u6709\u4e13\u95e8\u7528\u4e8e\u8868\u793a\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\u7684\u51fd\u6570\uff0c\u5373Heaviside(t)\u51fd\u6570\uff0c\u7528\u5b83\u5373\u53ef\u65b9\u4fbf\u5730\u8868\u793a\u51fa\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\u4ee5\u53ca\u5ef6\u65f6\u7684\u5355\u4f4d\u9636\u8dc3\u4fe1\u53f7\uff0c\u5e76\u4e14\u53ef\u4ee5\u65b9\u4fbf\u5730\u53c2\u52a0\u6709\u5173\u7684\u5404\u79cd\u8fd0\u7b97\u8fc7\u7a0b\u3002
f=heaviside(t+1/2)-heaviside(t-1/2);
ezplot(f);
F=fourier(f);
ezplot(F);
哈哈，这是我刚刚编好的
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