How to efficiently encode two values as a unique entitiy

Dear all,

With respect to the above subject, I wonder if we can make the following code more efficient and compact (reduce the ifelse)..

A=3;
B=3;
C=[];

if A==1 && B==1
    C=1;
elseif  A==1 && B==2
    C=2;
    elseif  A==1 && B==3
    C=3;
    elseif  A==2 && B==1
    C=4;
    elseif  A==2 && B==2
    C=5;
    elseif  A==2 && B==3
    C=6;
    elseif  A==3 && B==1
    C=7;
    elseif  A==3 && B==2
    C=8;
    elseif  A==3 && B==3
    C=9;
end

In addition, I also wonder if we can scale it up for A=[2;2;3;1] and B= [1;1;3;1]

Thanks in advance

Answer 1

[Stephen23]

M =  [1,2,3;NaN,4,5;6,7,8];
C = M(A,B)

"In addition, I also wonder if we can scale it up for A=[2;2;3;1] and B= [1;1;3;1]"

arrayfun(@(a,b)M(a,b),A,B)

[balandong]

Dear Stephen,

Thanks for the quick reply, your solution work like a charm

Answer 2

[Andrei Bobrov]

in your case:

>> A=[3;3;3;1]; B= [1;1;3;1];
f = @(A,B)  3*(A(:) - 1) + B(:);
C = f(A,B)
C =
     7
     7
     9
     1
>>