How do I associate specific values to specific verbiage?

I've got 2 arrays: A = [1; 2; 3; 1; 2; 3]; and B = [ ];

I need array B to contain [Lost; Found; Unk; Lost; Found; Unk] based on the values found in A.

I'm using the find function to locate the indices of the values 1, 2, and 3. But I'm not sure what to do next.

Any ideas are appreciated. Thanks.

Answer 1

[Azzi Abdelmalek]

A =  [1; 2; 3; 1; 2; 3]
v={'Lost'; 'Found'; 'Unk'}
B=v(A)

[Brad]

Azzi, my apologies. The solution provided works great. But I didn't provide enough detail in the question. I was thinking along the lines of IF statements (or other ideas) to get array B populated. So if 1 is found in A, B would get 'Lost', regardless of the number of rows in A.

[Azzi Abdelmalek]

Is this a question?, if yes it's not clear

[Brad]

Sorry Azzi.

What if A = [1; 11; 3; 1; 2; 3; 55; 1; 53; 29] ?

How would I associate 'Lost', 'Found', 'Unk' with 1,2, and 3?

[Azzi Abdelmalek]

Something is missing in your question

Answer 2

[Karen]

To achieve the desired transformation of array A into array B, you can use a combination of the find function and logical indexing in MATLAB. Here’s a step-by-step solution:

matlab

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A = [1; 2; 3; 1; 2; 3];

B = strings(size(A)); % Initialize B as a string array of the same size as A

% Find indices for each value in A

index1 = find(A == 1);

index2 = find(A == 2);

index3 = find(A == 3);

% Assign the corresponding strings to the indices

B(index1) = "Lost";

B(index2) = "Found";

B(index3) = "Unk";

% Display the result

disp(B);

Here’s how it works:

1. Initialization: We initialize B as a string array with the same size as A.
2. Finding Indices: Using the find function, we locate the indices of elements in A that are equal to 1, 2, and 3.
3. Assigning Values: We assign the corresponding string values ("Lost", "Found", "Unk") to the respective indices in B.
4. Displaying Result: Finally, we display the resulting array B.

The output will be:

matlab

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6×1 string array

"Lost"

"Found"

"Unk"

"Lost"

"Found"

"Unk"