MATLAB符号表达式赋值问题!syms x;A=zeros(9,9);B=[x^5,x^3,x;3*x^2,4,7*x^4;5,7,1]; A(1:3,1:3)=B;可以实现,但A(1:3,1:3)=A(1:3,1:3)+B;就不行,错误报告如下:The following error occurred converting from sym to double:Error using ==> mu
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