How to solve : Subscripted assignment dimension mismatch error

2017 5 26
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更新时间：2017 5 26
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Dear guys I am new in MATLAB. It is a simple code which i make it. but i get this error message"Subscripted assignment dimension mismatch." I dont know whats the problem with that. would you please help me?
A=[]
A=randi(10,2,3)
for i=1:2
for j=1:3
if A(i,j)>3
A(i,j)='ok';
elseif A(i,j)==2
A(i,j)='no'
else
A(i,j)=' ';
end
end
end

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Stephen23
Stephen23 2017-5-26
编辑：Stephen23 2017-5-26
A is a numeric array, which you then try to force non-scalar char vector into the elements of. It is not possible to put multiple array elements into one element of another array. If r and c are scalars, then:
X(r,c) = 1; % okay
X(r,c) = [1,2] % an error

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bahar kh
bahar kh 2017-5-26

0 个投票

still I have a question.when I change the code to the following form it works too.why? the last code and new one, almost are the same. but why the original code in my question doesn't work but the modified version works? what is the difference between them? thanks in advance
the modifiied version is here A=[] A=randi(10,2,3) for i=1:2 for j=1:3 if A(i,j)>3 A(i,j)=0; elseif A(i,j)==2 A(i,j)=2 else A(i,j)=6; end end end

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Andrei Bobrov
Andrei Bobrov 2017-5-26
>> A=randi(10,2,3)
A =
9 2 7
10 10 1
>> A(1,1) = 2
A =
2 2 7
10 10 1
>> A(2,1) = 'no'
Assignment has more non-singleton rhs dimensions than non-singleton subscripts
>> double('no')
ans =
110 111
>>

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Andrei Bobrov
Andrei Bobrov 2017-5-26

0 个投票

Use cell - array ( Aout) for output data in your function
A=randi(10,2,3);
Aout = cell(size(A);
for i=1:2
for j=1:3
if A(i,j)>3
Aout{i,j}='ok';
elseif A(i,j)==2
Aout{i,j}='no'
else
Aout{i,j}=' ';
end
end
end

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bahar kh
bahar kh 2017-5-26
编辑：bahar kh 2017-5-26
thanks@Andrei Bobrov. It works for me. but still I have a question.when I change the code to the following form it works too.why? the last code and new one, almost are the same. but why the original code in my question doesn't work but the modified version works? what is the difference between them? thanks in advance
the modifiied version is here A=[] A=randi(10,2,3) for i=1:2 for j=1:3 if A(i,j)>3 A(i,j)=0; elseif A(i,j)==2 A(i,j)=2 else A(i,j)=6; end end end

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