作业帮Matlab中出现Error using ==> .*程序下：n=2;X=[1,2,3,4,5];Y=[4,4,5,6,8,8.5];W=[2,1,3,1,1];N=length(X);A=(X'*ones(1,n)).^(ones(N,1)*(0:1:n-1));b=Y;AA=A'*(A.*(W'*(ones(1,n))))Ab=A'*(b'.*W')C=AA^(-1)*Abt=X(1)-0.1*(X(N)-X(1)):0.1:X(N)+0.1*(X(N)-X(1)
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![Matlab中出现Error using ==> .*程序下：n=2;X=[1,2,3,4,5];Y=[4,4,5,6,8,8.5];W=[2,1,3,1,1];N=length(X);A=(X'*ones(1,n)).^(ones(N,1)*(0:1:n-1));b=Y;AA=A'*(A.*(W'*(ones(1,n))))Ab=A'*(b'.*W')C=AA^(-1)*Abt=X(1)-0.1*(X(N)-X(1)):0.1:X(N)+0.1*(X(N)-X(1)](/uploads/image/z/4522382-62-2.jpg?t=Matlab%E4%B8%AD%E5%87%BA%E7%8E%B0Error+using+%3D%3D%3E+.%2A%E7%A8%8B%E5%BA%8F%E4%B8%8B%EF%BC%9An%3D2%3BX%3D%5B1%2C2%2C3%2C4%2C5%5D%3BY%3D%5B4%2C4%2C5%2C6%2C8%2C8.5%5D%3BW%3D%5B2%2C1%2C3%2C1%2C1%5D%3BN%3Dlength%28X%29%3BA%3D%28X%27%2Aones%281%2Cn%29%29.%5E%28ones%28N%2C1%29%2A%280%3A1%3An-1%29%29%3Bb%3DY%3BAA%3DA%27%2A%28A.%2A%28W%27%2A%28ones%281%2Cn%29%29%29%29Ab%3DA%27%2A%28b%27.%2AW%27%29C%3DAA%5E%28-1%29%2AAbt%3DX%281%29-0.1%2A%28X%28N%29-X%281%29%29%3A0.1%3AX%28N%29%2B0.1%2A%28X%28N%29-X%281%29)
Matlab中出现Error using ==> .*程序下：n=2;X=[1,2,3,4,5];Y=[4,4,5,6,8,8.5];W=[2,1,3,1,1];N=length(X);A=(X'*ones(1,n)).^(ones(N,1)*(0:1:n-1));b=Y;AA=A'*(A.*(W'*(ones(1,n))))Ab=A'*(b'.*W')C=AA^(-1)*Abt=X(1)-0.1*(X(N)-X(1)):0.1:X(N)+0.1*(X(N)-X(1)
Matlab中出现Error using ==> .*
程序下：
n=2;
X=[1,2,3,4,5];
Y=[4,4,5,6,8,8.5];
W=[2,1,3,1,1];
N=length(X);
A=(X'*ones(1,n)).^(ones(N,1)*(0:1:n-1));
b=Y;
AA=A'*(A.*(W'*(ones(1,n))))
Ab=A'*(b'.*W')
C=AA^(-1)*Ab
t=X(1)-0.1*(X(N)-X(1)):0.1:X(N)+0.1*(X(N)-X(1));
plot(X,Y,'p',t,polyval([C(2),C(1)],t));grid;
Matlab中出现Error using ==> .*程序下：n=2;X=[1,2,3,4,5];Y=[4,4,5,6,8,8.5];W=[2,1,3,1,1];N=length(X);A=(X'*ones(1,n)).^(ones(N,1)*(0:1:n-1));b=Y;AA=A'*(A.*(W'*(ones(1,n))))Ab=A'*(b'.*W')C=AA^(-1)*Abt=X(1)-0.1*(X(N)-X(1)):0.1:X(N)+0.1*(X(N)-X(1)
你的b是一个6维矩阵,前后都是5维度的.不能相乘
Ab=A'*(b'.*W') 出错