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

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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]

Risposta accettata

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

Più risposte (2)

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

John BG
John BG il 12 Ott 2015
Also possible: find(mod(X,2)==0) and find(mod(X,2)~=0)
  2 Commenti
Image Analyst
Image Analyst il 12 Ott 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 il 13 Feb 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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