matlab程序绘出一个公式的图形e^-2t * cos(3*pi*t)*[u(t)-u(t-3)] 程序如下 t=-1:0.01:4;m=(t>0);n=(t>3);x=exp(-2t)*[cos(3*pi*t)*(m-n)];plot(x,t);axis([-10,10,-2,5]);老提示 x=exp(-2t)*[cos(3*pi*t)*(m-n)];|Error:Missing MATLAB operator.公
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![matlab程序绘出一个公式的图形e^-2t * cos(3*pi*t)*[u(t)-u(t-3)] 程序如下 t=-1:0.01:4;m=(t>0);n=(t>3);x=exp(-2t)*[cos(3*pi*t)*(m-n)];plot(x,t);axis([-10,10,-2,5]);老提示 x=exp(-2t)*[cos(3*pi*t)*(m-n)];|Error:Missing MATLAB operator.公](/uploads/image/z/2541976-16-6.jpg?t=matlab%E7%A8%8B%E5%BA%8F%E7%BB%98%E5%87%BA%E4%B8%80%E4%B8%AA%E5%85%AC%E5%BC%8F%E7%9A%84%E5%9B%BE%E5%BD%A2e%5E-2t+%2A+cos%283%2Api%2At%29%2A%5Bu%28t%29-u%28t-3%29%5D+%E7%A8%8B%E5%BA%8F%E5%A6%82%E4%B8%8B+t%3D-1%3A0.01%3A4%3Bm%3D%28t%3E0%29%3Bn%3D%28t%3E3%29%3Bx%3Dexp%28-2t%29%2A%5Bcos%283%2Api%2At%29%2A%28m-n%29%5D%3Bplot%28x%2Ct%29%3Baxis%28%5B-10%2C10%2C-2%2C5%5D%29%3B%E8%80%81%E6%8F%90%E7%A4%BA+x%3Dexp%28-2t%29%2A%5Bcos%283%2Api%2At%29%2A%28m-n%29%5D%3B%7CError%3AMissing+MATLAB+operator.%E5%85%AC)
matlab程序绘出一个公式的图形e^-2t * cos(3*pi*t)*[u(t)-u(t-3)] 程序如下 t=-1:0.01:4;m=(t>0);n=(t>3);x=exp(-2t)*[cos(3*pi*t)*(m-n)];plot(x,t);axis([-10,10,-2,5]);老提示 x=exp(-2t)*[cos(3*pi*t)*(m-n)];|Error:Missing MATLAB operator.公
matlab程序绘出一个公式的图形
e^-2t * cos(3*pi*t)*[u(t)-u(t-3)]
程序如下
t=-1:0.01:4;
m=(t>0);n=(t>3);
x=exp(-2t)*[cos(3*pi*t)*(m-n)];
plot(x,t);axis([-10,10,-2,5]);
老提示
x=exp(-2t)*[cos(3*pi*t)*(m-n)];
|
Error:Missing MATLAB operator.
公式哪错了
还有那个单位阶跃信号用 function 怎么整
然后就是
Error using ==> mtimes
Inner matrix dimensions must agree.
matlab程序绘出一个公式的图形e^-2t * cos(3*pi*t)*[u(t)-u(t-3)] 程序如下 t=-1:0.01:4;m=(t>0);n=(t>3);x=exp(-2t)*[cos(3*pi*t)*(m-n)];plot(x,t);axis([-10,10,-2,5]);老提示 x=exp(-2t)*[cos(3*pi*t)*(m-n)];|Error:Missing MATLAB operator.公
首先,exp(-2t) 改成 exp(-2*t)
其次,cos(3*pi*t)维数是1*501,后面m-n维数也是1*501,二者肯定不能直接相乘了