Using cases with strings

Hi, Im trying to make the following code work and it just wont seem to do what I want

 Astr = '123456789'

 switch Astr

    case strcmp(Astr([2:4,5:7]), '234567' )

        x = 5

    case strcmp(Astr([2:4,5:7]), '123567' )

        x = 6

    case strcmp(Astr([2:4,5:7]), '345567' )

        x = 7

    otherwise

        x = 8
end

I think it has to do with the way Im defining the string values, it keeps outputting x = 8 (the otherwise case). Please let me know how to fix thanks!

Answer 1

[Iain]

What you put after the case needs to be every valid option to enter that case, and NOT an operation.

 switch Astr([2:4,5:7]) 
  case {'234567', '765432'}
   x = 5;
  case '123567'
   x = 6;
  case '234567'
   x = 7;
  otherwise
   x=8;
 end

[JP]

What if my Astr is constantly changing length, so I want to check a different interval?

Say for case 1, I want to check the interval 2:4,5:7, but then in case 2 I want to check the interval 3:5,6:8?