MATLAB: Have a function take a string and an number as an input

script in functions

I am trying to create a function that can take a name of an alloy of metal and a temperature and calculate the thermal conductivity, I'm having issues getting the function to accept the script. This is the code I have so far.
    function [alloy,T] = ThCond(alloy,T)
          switch alloy
              case 'Al2'
                      if (298 <= T) && (T <= 840)
                          k = 149.7 + 0.0809.*T - (1.*10^(-4)).*(T.^2);
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      elseif (298 <= T) && (T <= 773)
                          k = 76.64 + 0.2633.*T - (2.*10^(-4)).*(T^2);
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
               case 'Al3'
                      if (293 <= T) && (T <= 890)
                          k = 124.7 + 0.56.*T + (1*10^(-5)).*(T^2);
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!'); 
                      end
                case 'Cu1'
                      if (100 <= T) && (T <= 1200)
                          k = 453.9 - 0.1054.*T;
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
              case 'Cu2'
                      if (460 <= T) && (T <= 1188)
                          k = 140.62 + (112.14.*10^(-4)).*T;
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
               case 'Cu3'
                      if  T <= 1443
                          k = 16.041 + (438.9.*10^(-4)).*T;
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
                case 'St1'
                      if (400 <= T) && (T <= 1000)
                          k = 76.63 - 0.0459.*T;
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
              case 'St2'
                      if (298 < T) && (T < 1573)
                          k = 6.31 + ((27.2.*10^(-3)).*T) - (7.*10^(-6)).*(T.^2);
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end
               case 'St3'
                      if  T <= 1727
                          k = 20 + (61.5.*10^(-4)).*T;
                          fprintf('\nThe thermal conductivity(k_s) is %6.2f\n', k')
                      else
                          disp('Invalid Temperature Input!');
                      end            
          end
          end

Best Answer

If you call it as follows, it works perfectly:

>>alloy='Al2';
T=300;
[Alloy,Temp]=ThCond(alloy,T)

The thermal conductivity(k_s) is 164.97

 Alloy =
    'Al2'
 Temp =
   300
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