# how to automate this manual code containing if else conditons?

2 views (last 30 days)
taimour sadiq on 15 Feb 2024
Edited: Les Beckham on 15 Feb 2024
i m creating a data based on values in variable seletion... if first value of selection is 1 it will pick data from Values cell 1 else if if contains 2 then from values cell 2... it works fine in this case but my data may change every time suppose now Selection = [1 1 1 2 2 2 3 3 3 3] and there are there sets of values or next time may b more or less.. how can i automate my code.. kindly guide..

Stephen23 on 15 Feb 2024
S = [1 1 1 1 2 2 2 2 2 2];
V{1} = [20 10 40 50 40 30 20 10 20 30];
V{2} = [10 20 30 20 10 30 20 40 20 30];
M = vertcat(V{:});
Z = M(sub2ind(size(M),S,1:numel(S)))
Z = 1×10
20 10 40 50 10 30 20 40 20 30

Les Beckham on 15 Feb 2024
Edited: Les Beckham on 15 Feb 2024
Here is one approach. I eliminated the extraneous parameter ini for this example.
I'm not sure I understand the role of the Time vector here. This may not do what you want if the sizes of Time and Selection are not the same.
Time = 1:10;
Selection = [1 1 1 1 2 2 2 2 2 2];
Values{1} = [20 10 40 50 40 30 20 10 20 30];
Values{2} = [10 20 30 20 10 30 20 40 20 30];
Final = zeros(size(Time));
uniqueValues = unique(Selection);
for ii = 1:numel(uniqueValues) %<<< handles any number of unique values in Selection
Final(Selection == uniqueValues(ii)) = Values{ii}(Selection == uniqueValues(ii));
end
disp(Final)
20 10 40 50 10 30 20 40 20 30
taimour sadiq on 15 Feb 2024
your Code is fine just one numeric mistake that why i was not getting the desired result.. now its works fine.. Thanks
Final(Selection == uniqueValues(ii)) = Values{1}(Selection == uniqueValues(ii));
should be
Final(Selection == uniqueValues(ii)) = Values{ii}(Selection == uniqueValues(ii));
Les Beckham on 15 Feb 2024
You are quite welcome. Good catch on that indexing error. I'll fix the answer.

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