Create a row vectors that includes even/odds between 0 and X

3 vues (au cours des 30 derniers jours)
Josh
Josh le 15 Fév 2013
Commenté : BAKALE MURPHY le 14 Mar 2017
How can I created a row vector that includes every even/odd number BETWEEN two variables but does not include them. ie x=10 y=20 vector=[12 14 16 18]

Réponse acceptée

Azzi Abdelmalek
Azzi Abdelmalek le 15 Fév 2013
x=10;
y=20;
v=x+1:y-1
v_even=v(mod(v,2)==0)
v_odd=v(mod(v,2)~=0)

Plus de réponses (2)

Image Analyst
Image Analyst le 15 Fév 2013
out = (x+1) : 2 : (y-1)
or
out = (x+2) : 2 : (y-1)

John BG
John BG le 12 Oct 2015
Also possible: find(mod(X,2)==0) and find(mod(X,2)~=0)
  2 commentaires
Image Analyst
Image Analyst le 12 Oct 2015
Not as-is -- you'd need to add code:
X = 10:20
oddNumbers = find(mod(X,2)==0)
gives
X =
10 11 12 13 14 15 16 17 18 19 20
oddNumbers =
1 3 5 7 9 11
which is not [11,13,15,17,19], but if you added all but the last element to the first element of the original X, it would work.
John BG
John BG le 13 Fév 2016
Should have added the X(),
find(mod(X,2)~=0)
does give the positions of the odd elements of X
ans = 11.00 13.00 15.00 17.00 19.00
and
find(mod(X,2)==0)
gives the even elements of X
ans = 10.00 12.00 14.00 16.00 18.00 20.00
Alternatively
nonzeros(mod(X,2).*X)'
also gives the odd elements of X

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