DOUBLE cannot convert the input expression into double array

[bugatti79]

Hi Folks,

I have a symbolic A=18*1*18 array containing symbols/expressions. I want to populate certain entries of this array into another matrix. For example

K(1,1)=A(1,1,1)

I get the following

? 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.

I have tried
K(1,1)=vpa(A(1,1,1)) and other forms but no luck
Is there a workaround?
Thanks

 

[soarce]

Have a look at this:

http://www.mathworks.com/matlabcentral/answers/89746-error-using-mupadmex-of-syms

You are trying to assign symbolic values to numerical variables.

 

[ORF]

Hi

Maybe you are interested in the function "subs"
http://es.mathworks.com/help/symbolic/subs.html

Greetings.