跪等!matlab中Vectors must be the same lengths

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跪等!matlab中Vectors must be the same lengths
figure(2),
x=[-4,-2,0,-4,-6,-4,-2,-4,-6,-6,-4,-4,-6,-6,-2,6,12,8,0,-16,-38,-60,-84,-90,-66,-32,-4,-2,-4,8,12,12,10,6,6,6,4,0,0,0,0,0,-2,-4,0,0,0,-2,-2,0,0,-2,-2,-2,-2,0];
y=filter(b1,a1,x);
subplot(221);plot(n,x);然后就有提示错误Vectors must be the same lengths

plot（n,x）的n是什么 ?
貌似是画图时坐标长度不一样

跪等!matlab中Vectors must be the same lengths matlab中错误vectors must be the same lengths 是怎么回事? matlab问题Vectors must be the same lengths. matlab运行遇到问题：Vectors must be the same lengths. matlab plot 提示错误：Vectors must be the same lengths! matlab的Vectors must be the same lengths.错误 matlab提示“Vectors must be the same lengths. matlab总是显示Vectors must be the same lengths,请大师帮忙, 求matlab高手~Error using plot Vectors must be the same lengths问哪位大侠知道这个MATLAB的错误啊 plot Vectors must be the same lengths. MATLAB运行错误：Error using plot Vectors must be the same lengths matlab在什么情况下出现Vectors must be the same lengths错误报告