matlab里没有quad8这个函数 怎么添加进去?%m53function y=m53(t)t=-10:0.1:10;ft=tripuls(t,2);subplot(3,1,1),plot(t,ft)F=fft(ft)subplot(3,1,2),stem(t,F)y=F;f=linspace(0,10,256)N=length(f);w=zeros(1,N);for k=1:Nw(k)=quad8('m53',0,f(k));endsubp
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![matlab里没有quad8这个函数 怎么添加进去?%m53function y=m53(t)t=-10:0.1:10;ft=tripuls(t,2);subplot(3,1,1),plot(t,ft)F=fft(ft)subplot(3,1,2),stem(t,F)y=F;f=linspace(0,10,256)N=length(f);w=zeros(1,N);for k=1:Nw(k)=quad8('m53',0,f(k));endsubp](/uploads/image/z/7111529-17-9.jpg?t=matlab%E9%87%8C%E6%B2%A1%E6%9C%89quad8%E8%BF%99%E4%B8%AA%E5%87%BD%E6%95%B0+%E6%80%8E%E4%B9%88%E6%B7%BB%E5%8A%A0%E8%BF%9B%E5%8E%BB%3F%25m53function+y%3Dm53%28t%29t%3D-10%3A0.1%3A10%3Bft%3Dtripuls%28t%2C2%29%3Bsubplot%283%2C1%2C1%29%2Cplot%28t%2Cft%29F%3Dfft%28ft%29subplot%283%2C1%2C2%29%2Cstem%28t%2CF%29y%3DF%3Bf%3Dlinspace%280%2C10%2C256%29N%3Dlength%28f%29%3Bw%3Dzeros%281%2CN%29%3Bfor+k%3D1%3ANw%28k%29%3Dquad8%28%27m53%27%2C0%2Cf%28k%29%29%3Bendsubp)
matlab里没有quad8这个函数 怎么添加进去?%m53function y=m53(t)t=-10:0.1:10;ft=tripuls(t,2);subplot(3,1,1),plot(t,ft)F=fft(ft)subplot(3,1,2),stem(t,F)y=F;f=linspace(0,10,256)N=length(f);w=zeros(1,N);for k=1:Nw(k)=quad8('m53',0,f(k));endsubp
matlab里没有quad8这个函数 怎么添加进去?
%m53
function y=m53(t)
t=-10:0.1:10;
ft=tripuls(t,2);
subplot(3,1,1),plot(t,ft)
F=fft(ft)
subplot(3,1,2),stem(t,F)
y=F;
f=linspace(0,10,256)
N=length(f);
w=zeros(1,N);
for k=1:N
w(k)=quad8('m53',0,f(k));
end
subplot(3,1,3),plot(f,w);
xlabel('Hz')
ylabel('E')
Undefined function or method 'quad8' for input arguments of type 'char'.
Error in ==> m53 at 16
w(k)=quad8('m53',0,f(k));
matlab里没有quad8这个函数 怎么添加进去?%m53function y=m53(t)t=-10:0.1:10;ft=tripuls(t,2);subplot(3,1,1),plot(t,ft)F=fft(ft)subplot(3,1,2),stem(t,F)y=F;f=linspace(0,10,256)N=length(f);w=zeros(1,N);for k=1:Nw(k)=quad8('m53',0,f(k));endsubp
quad 采用较低次的可塑性递回辛普森积分法则(adaptive recursive Simpson rule)
quad8 采用可塑性递回八段Newton-Cotes积分法则(adaptive recursive Newton-Cotes 8 panelrule)
quad8不管是在精度上还是在速度上都明显高于quad
而现在这个函数已经不用了,取而代之的是quadl.