Symbolic Expression Error problem !

Question

Amit Chakraborty 2022-1-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1633850-symbolic-expression-error-problem

评论： Amit Chakraborty 2022-1-22

I have two codes. one is with the numeric value and another code with the sysmbolic value. But both of them are same logic.

Any kind of suggestion or solution would be helpful for me. Thanks in Advance!

%% Numeric Value Code
FFF = rand(8,2);
TTT = rand(2,2);
FFF = reshape(FFF, 4, 2, []);
TTT = reshape(TTT, 1, 2, []);
Result_FRD = reshape(FFF .* TTT, 4*2,[]) ;
%% Symbolic Expression Code
FFF = sym('FF',[8 2]) ; 
TTT = sym('TT',[2 2]) ;   
TTT = reshape(TTT, 1, 2, []);
FFF = reshape(FFF, 4, 2, []);
RRR = reshape(FFF .* TTT, 4*2,[]);

ERROR I am Having ::::::::

Error using symengine

Array sizes must match.

Error in sym/privBinaryOp (line 1034)

Csym = mupadmex(op,args{1}.s, args{2}.s, varargin{:});

Error in .* (line 323)

X = privBinaryOp(A, B, 'symobj::zipWithImplicitExpansion', '_mult');

Error in FD_Test (line 14)

RRR = reshape(FFF .* TTT, 4*2,[]);

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Answer 1

KSSV 2022-1-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1633850-symbolic-expression-error-problem#answer_879500

编辑：KSSV 2022-1-22

在 MATLAB Online 中打开

Proceed with loop.

%% Numeric Value Code
FFF = rand(8,2);
TTT = rand(2,2);
FFF = reshape(FFF, 4, 2, []);
TTT = reshape(TTT, 1, 2, []);
Result_FRD = reshape(FFF .* TTT, 4*2,[]) ;
%% Symbolic Expression Code
FFF = sym('FF',[8 2]) ; 
TTT = sym('TT',[2 2]) ;   
TTT = reshape(TTT, 1, 2, []);
FFF = reshape(FFF, 4, 2, []);
%
RRR = FFF ; 
for i = 1:2
    RRR(:,:,i) = FFF(:,:,i).*TTT(:,:,i) ; 
end
RRR = reshape(RRR, 4*2,[]);