MATLAB: Need help with If statement

if statement

Hello everyone, My question is, in the below code, idsabs can take any value from 1 to 16. Depending on the value of idsabs, i want to set the value of idcabs. Is there any other way of doing this, because i think its too long just to get a single value. Thank you so much and Happy New Year.
         if idsabs>=1 && idsabs<=2
              idcabs=1;
          elseif idsabs>=3 && idsabs<=4
              idcabs=3;
          elseif idsabs>=5 && idsabs<=6
              idcabs=4;
          elseif idsabs>=7 && idsabs<=8
              idcabs=6;
          elseif idsabs>=9 && idsabs<=10
              idcabs=5;
          elseif idsabs>=11 && idsabs<=12
              idcabs=7;
          elseif idsabs>=13 && idsabs<=14
              idcabs=8;
          elseif idsabs>=15 && idsabs<=16
              idcabs=2; 
          end

Best Answer

If adsabs only has whole values, then you could simply use a look-up table:
vec = [1,3,4,6,5,7,8,2];
adcabs = vec(ceil(adsabs/2));
This produces exactly the same values for adcabs as your questions gives:
>> arrayfun(@(x) vec(ceil(x/2)), 1:16)
ans = [1  1  3  3  4  4  6  6  5  5  7  7  8  8  2  2]
If you can tell us something about how the order of adcabs was generated, then maybe we could come up with a small function instead.
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