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Matlab中Inner matrix dimensions must agree.

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Matlab中Inner matrix dimensions must agree.
>> clear
>> Ts=10*10^(-6);
M=4;
f0=5*10^6;
B=30*10^6;
>> fs=300*1/Ts/10;
>> t=[0:1:100];
>> if 0 U=B/Ts;
>> S1=u*exp(f0*t+0.5*U*t*t);就到这一步出现上面的问题.
Matlab中Inner matrix dimensions must agree.
% S1=u*exp(f0*t+0.5*U*t*t); t 是向量要用点乘
S1=u*exp(f0*t+0.5*U.*t.*t);
再问： U不用点乘吧？只有t要用？
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