问题描述：
新手 matlab
A =
1 2 3 3
5 6 7 8
9 10 11 12
13 14 15 16
>> syms c;
>> A(:,1)=c*A(:,1)
The following error occurred converting from sym to double:
Error using ==> mupadmex
Error in MuPAD command:DOUBLE cannot convert the input expression into a double array.
If the input expression contains a symbolic variable,use the VPA function instead.
>>
A =
1 2 3 3
5 6 7 8
9 10 11 12
13 14 15 16
>> syms c;
>> A(:,1)=c*A(:,1)
The following error occurred converting from sym to double:
Error using ==> mupadmex
Error in MuPAD command:DOUBLE cannot convert the input expression into a double array.
If the input expression contains a symbolic variable,use the VPA function instead.
>>
问题解答：
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