MATLAB: How to plug values into a symbolic matrix

matrix manipulationsymbolic

I have developed a code pasted below :
:
  syms concoutA concoutB concoutC concoutD fA fB fC fD
  syms flowinA flowinB flowinC flowinD Vol concinA concinB concinC concinD 
  syms flowout k1 k2
  fA= ((flowinA*concinA-flowout*concoutA)/Vol) - k1*concoutA*concoutB
  fB= ((flowinB*concinB-flowout*concoutB)/Vol) - k1*concoutA*concoutB - k2*concoutB*concoutC
  fC= ((-flowout*concoutC)/Vol) + k1*concoutA*concoutB - k2*concoutB*concoutC
  fD= ((-flowout*concoutD)/Vol) + k1*concoutB*concoutC
  molflow = [ fA; fB; fC; fD ]
  bigmatrix = jacobian(molflow,[concoutA,concoutB, concoutC, concoutD])
  concinA = input('Enter the concentration of Chemical A flowing into the reactor [kmol/m^3] : ')
  concinB = input('Enter the concentration of Chemical B flowing into the reactor [kmol/m^3] : ')
  k1=input('Enter desired rate of reaction 1 A+B->C [m^3/kmol*sec] : ')
  k2=input('Enter desired rate of reaction 2 B+C->D [m^3/kmol*sec] : ')
  flowinA=input('Enter the flowrate of Chemical A into the reactor [m^3/sec] : ')
  flowinB=input('Enter the flowrate of Chemical B into the reactor [m^3/sec] : ')
  Vol=input('Enter desired volume of reactor vessel [m^3] : ')
  concoutGuess= input('Enter initial guess for final concentrations of chemical species A, B, C, D respectively in the format "[A B C D]" kmol/m^3 : ')
  concoutA=concoutGuess(1);
  concoutB=concoutGuess(2);
  concoutC=concoutGuess(3);
  concoutD=concoutGuess(4);
    flowout=flowinA+flowinB;
    fA= ((flowinA*concinA-flowout*concoutA)/Vol) - k1*concoutA*concoutB
    fB= ((flowinB*concinB-flowout*concoutB)/Vol) - k1*concoutA*concoutB - k2*concoutB*concoutC
    fC= ((-flowout*concoutC)/Vol) + k1*concoutA*concoutB - k2*concoutB*concoutC
    fD= ((-flowout*concoutD)/Vol) + k1*concoutB*concoutC
    molflow = [ fA; fB; fC; fD ]
  end
I want to plug in the values for the inputs into "bigmatrix" but am not able to do so. 'bigmatrix' still outputs with variables names instead of calculated integer values. Is it because I have used symbolic? How do I get around this?
Providing the code will be very helpful! Thank you

Best Answer

Have managed to figure out the solution.
For other interested in the answer to this
Code:
Bigmatrix=subs(bigmatrix)
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