Error using ==> stem The length of X must match the number of rows of Y.怎么改?

Error using ==> stem The length of X must match the number of rows of Y.怎么改? Matlab中出错了,>> k1=0:50;w=0.08*pi;s=cos(w*k1);N=50;k2=0:N-1;d=rand(1,N);x=s+d;subplot(3,1,1);stem(d);subplot(3,1,2);stem(x);subplot(3,1,3);stem(s)Error using ==> plusMatrix dimensions must agree. matlab中的输出表,我用conv后输出,有提示,请高手指点>> N=200-1; n=1:100; x1=0.5*n; x2=2*n; yc=conv(x1,x2);subplot(3,1,3),stem(N,yc); ? Error using ==> stem The length of X must match the number of rows of Y. 请问matlab怎么画出单位阶跃序列老师给的是 n = 0:20;s= [ones(1,20)];stem(n,u);xlabel(‘时间序号(n)’);ylabel('振幅');title('单位采样序列');axis([0 20 0 1.2]);我弄到stem(n,u);就提示Error using ==> stemThe length of X matlab--?Error using ==> mtimes Inner matrix dimensions must agree.x=[ones(1,10) zeros(1,41)];n=1:50;k=-25:25;W=(pi/12.5)*k;f=(1/25)*k*1000;X=x*(exp(-j*pi/12.5)).^(n'*k);magX=abs(X);subplot(3,2,2);stem(x);title('输入信号x[n]');subplot(3,2,3);stem MATLAB程序总是出现?Error using ==> stem at 44 X must be same length as Y.%hammingchuang.mM=11;n=[0:1:M-1];wc=0.3*pi;hd=ideal_lp(wc,M);w_rec=(boxcar(M))';w_ham=(hamming(M))';h_rec=hd.*w_rec;h_ham=hd.*w_ham;[db1,mag1,pha1,grd1,w1]=freqz_m(h_rec,[ 用matlab实现傅里叶变换~用户输入函数~N=8;t=0:N-1;xn=('edit1')Xk=fft('xn',N); 到这里就报错!plot(Xk);stem(t,abs(Xk),'.');axes(handles,axes2,[0,20,0,20]);ylabel('|Xk|');title('8点FFT变换');Error using ==> fftNot enough input argume matlab关于一个很简单的fill函数应用x=0:pi/10:2*pi;y=sin(x);fill(x,y);不知道为什么函数图象出不来,fill换成stem却行而且给的错误是Error using ==> fillNot enough input arguments. matlab Error using ==> sym.mpowerError using ==> sym.mpowerMatrix must be square.我没用什么矩阵饿? Error using ==> rgb2gray>parse_inputs MAP must be a m x 3 array. MATLAB第三幅图总是出现? Error using ==> stem The length of X must match the number of rows of Y求解答!n=0:31;f=1/16;xn=2*sin(2*pi*0.125*n)+3*cos(2*pi*(0.125+f)*n);xn_1=[xn,zeros(1,96)];XN=fft(xn);XN_1=fft(xn_1);w=n*2*pi/length(n);figure;su 请问下面的程序有错吗?matlab老是提示Error using stem (line 44) X must be same length as Y.求指教>> clf;>> N=8;>> n1=-N:-1;>> c1=-4*j*sin(n1*pi/2)/pi^2/n1.^2;>> c0=0;>> n2=1:N;>>c2=-4*j*sin(n2*pi/2)/ pi^2/n2.^2;>> cn=[c1 c0 c2];>> n=-N matlab ? Error using ==> mpower Matri>> x=linspace(-2,2,100);>> y=(x^2)*sin(x^2-x-2);plot(x,y)? Error using ==> mpowerMatrix must be square.这个要怎么改? matlab中的cos(n^2)为什么不对cos(n^2)Error using ==> mpowerMatrix must be square.>> x=cos(n*n);Error using ==> mtimesInner matrix dimensions must agree.我是R2007 Matlab程序提示错误：Error using * Inner matrix dimensions must agree.Matlab程序：x=0.01:0.01:9; y=(4.5-x)*sqrt(9*x-x.^2); 提示：Error using * Inner matrix dimensions must agree. MATLAB程序,这个程序不知道为什么出现?Error using ==> mpower Matrix must be square. 在matlab中运行出现错误：Error using ==> rstool Insufficient data to fit model Linear. Error using ==> ga Too many input arguments.Error in ==> GABPNET at 22Error using ==> gaToo many input arguments.Error in ==> GABPNET at 22[x,endPop,bPop,trace]=ga('gabpEval',aa,[],initPpp,[1e-6 1 1],'maxGenTerm',gen,...哥们,似乎你也遇过同