how to create an array from a given array with the following criteria.

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Pranjal Kaura
Pranjal Kaura 2020-6-12
回答： Ameer Hamza 2020-6-12
Say given array is [1 2 3]. I want to create an array with the elements [1 2 3 4 5 2 3 4 5 6 3 4 5 6 7],
In others terms I want to create an array [1:1+4 2:2+4 3:3+4]
I do not want to use for loops as that slows my code considerably.

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采纳的回答

madhan ravi
madhan ravi 2020-6-12
a = 1:3
Wanted = reshape(cumsum([a; ones(4,numel(a))]),1,[])

更多回答（1 个）

Ameer Hamza
Ameer Hamza 2020-6-12
An alternative solution using automatic array expansion
a = 1:3;
b = reshape(a + (0:4)', [], 1);

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