Matlab，矩阵尺寸必须一致

Question

我需要创建一个矩阵，其中我有0-1范围内的点，模拟xor门，如图所示，bu点也应存在于左上角和右下角。

我正在使用此代码：

    pats = [0.4*rand(n/4,2);
            0.4*rand(n/4,2)+0.6;
            0.4*rand(n/4,2)+[0 0.5];
            0.4*rand(n/4,2)-[0 0.5]+0.6];

我收到以下错误：

Warning: Size vector should be a row
vector with integer elements. 
> In main at 24 
Warning: Size vector should be a row
vector with integer elements. 
> In main at 24 
Warning: Size vector should be a row
vector with integer elements. 
> In main at 24 
Warning: Size vector should be a row
vector with integer elements. 
> In main at 24 
Error using  + 
Matrix dimensions must agree.

Error in main (line 24)
        pats = [0.4*rand(n/4,2);

Answer 1

元素明智的添加对您的randn(n/4,2) + [0 0.5]不起作用，因为您试图将n/4乘2矩阵添加到1乘2矩阵。您需要使用bsxfun：

pats = [0.4*rand(n/4,2);
    0.4*rand(n/4,2)+0.6;
    bsxfun(@plus,0.4*rand(n/4,2),[0 0.5]);
    bsxfun(@minus,0.4*rand(n/4,2),[0 0.5]) + 0.6];

函数bsxfun(@plus, A, b)会将b的第i个元素添加到矩阵A的第i列。