MATLAB: How to change values in the matrix according to conditions.

matrix

I have a zeros(size,size) matrix that i want the values to change depending on my conditions. I have two conditions:
Support = FixedFixed or Support = PinnedPinned
When Support = FixedFixed my matrix coordinates should be
   a(1,1) = 7;
   a(1,2) = -4;
   a(1,3) = 1;
   a(size,size-2)=1;
   a(size,size-1)=-4;
   a(size,size)=7;
and when Support = PinnedPinned my matrix should be
   a(1,1) = 5;
   a(1,2) = -4;
   a(1,3) = 1;
   a(size,size-2)=1;
   a(size,size-1)=-4;
   a(size,size)=5;
can anyone help me code this?

Best Answer

Try a switch.
switch SupportType 
   case 'PinnedPinned' 
     a(1,1) = 5;
     a(1,2) = -4;
     a(1,3) = 1;
     a(size,size-2)=1;
     a(size,size-1)=-4;
     a(size,size)=5;
   case 'FixedFixed' 
     a(1,1) = 7;
     a(1,2) = -4;
     a(1,3) = 1;
     a(size,size-2)=1;
     a(size,size-1)=-4;
     a(size,size)=7; 
  end
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