How to insert an element after each number in a vector?
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laith Farhan
le 5 Mai 2019
Commenté : Star Strider
le 5 Mai 2019
Dear all,
I would like to add an element after each value in a vector, for example:
a=[10,2,40,58,100,90,40,30,4];
I would like to add 1 to vector values:
result = [1,10,1,2,1,40,1,58,1,100,1,90,1,40,1,30,1,4,1];
Help me please.....
1 commentaire
Image Analyst
le 5 Mai 2019
Instead of "after each number" don't you mean "after each number, EXCEPT the first number, where the number is also before the first number?" That's what Star and Adams solutions do. Or do you really mean what you said, instead of the "result" you gave, and so there would be no 1 at the beginning?
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Star Strider
le 5 Mai 2019
One approach:
a=[10,2,40,58,100,90,40,30,4];
result = [ones(size(a)); a];
result = [result(:); 1]'
producing:
result =
1 10 1 2 1 40 1 58 1 100 1 90 1 40 1 30 1 4 1
4 commentaires
Plus de réponses (2)
Adam Danz
le 5 Mai 2019
result = [reshape([ones(size(a));a],length(a)*2,1);1]';
3 commentaires
KALYAN ACHARJYA
le 5 Mai 2019
Modifié(e) : KALYAN ACHARJYA
le 5 Mai 2019
Nice one, +1, I tried, but can't
Image Analyst
le 5 Mai 2019
Instead of "after each number" did you mean "after each number, EXCEPT the first number, where the number is also before the first number?" That's what Star and Adam's solutions do. Or do you really mean what you said, instead of the "result" you gave, and so there would be no 1 at the beginning?
Just to be complete and cover all ambiguities, I'll give the other solution. If you really want what you said in words, rather than the numerical result you gave, then use this code:
result = [a; ones(size(a))]
result = result(:)'
The result is:
result =
10 1 2 1 40 1 58 1 100 1 90 1 40 1 30 1 4 1
Note: 1's are only after the numbers and not before the first one.
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